{"id":"GHSA-mqqg-xjhj-wfgw","revision":null,"records":[{"revision":"57bd93e7499b4a91af91119d7524ce43","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-27592","aliases":[],"title":"Stored XSS in Miniflux when opening a broken image due to unescaped ServerError in proxy handler","description":"Miniflux is a feed reader. Since v2.0.25, Miniflux will automatically proxy images served over HTTP to prevent mixed content errors. \n\nWhen an outbound request made by the Go HTTP client fails, the `html.ServerError` is returned unescaped without the expected Content Security Policy header added to valid responses.\n\nBy creating an RSS feed item with the inline description containing an `<img>` tag with a `srcset` attribute pointing to an invalid URL like `http:a<script>alert(1)</script>`, we can coerce the proxy handler into an error condition where the invalid URL is returned unescaped and in full.\n\nThis results in JavaScript execution on the Miniflux instance as soon as the user is convinced (e.g. by a message in the alt text) to open the broken image.\n\nAn attacker can execute arbitrary JavaScript in the context of a victim Miniflux user when they open a broken image in a crafted RSS feed. This can be used to perform actions on the Miniflux instance as that user and gain administrative access to the Miniflux instance if it is reachable and the victim is an administrator.\n\nA patch is available in version 2.0.43. As a workaround sisable image proxy; default value is `http-only`.","state":0,"publishedAt":"2023-03-17T19:04:00.63+00:00","modifiedAt":"2025-02-25T14:53:55.753+00:00","affected":[{"ecosystem":"Vendor product","name":"v2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"miniflux\",\n                    \"product\": \"v2\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 2.0.25, < 2.0.43\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N","score":4.8,"severity":"MEDIUM"}],"references":["https://github.com/miniflux/v2/security/advisories/GHSA-mqqg-xjhj-wfgw","https://github.com/miniflux/v2/pull/1746","https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L76","https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L90","https://github.com/miniflux/v2/releases/tag/2.0.25","https://github.com/miniflux/v2/releases/tag/2.0.43","https://miniflux.app/docs/configuration.html#proxy-images"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-27592","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-27592","identifiers":["CVE-2023-27592"]},"retained":false,"historicalAffected":[]},{"revision":"bb2092a23f0a474db8187299bd23b734","observedAt":"2026-11-14T03:00:44.025+00:00","statement":{"source":"euvd","id":"EUVD-2023-31334","aliases":["CVE-2023-27592","GHSA-mqqg-xjhj-wfgw"],"title":"Miniflux is a feed reader. 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Since v2.0.25, Miniflux will automatically proxy images served over HTTP to prevent mixed content errors. \n\nWhen an outbound request made by the Go HTTP client fails, the `html.ServerError` is returned unescaped without the expected Content Security Policy header added to valid responses.\n\nBy creating an RSS feed item with the inline description containing an `<img>` tag with a `srcset` attribute pointing to an invalid URL like `http:a<script>alert(1)</script>`, we can coerce the proxy handler into an error condition where the invalid URL is returned unescaped and in full.\n\nThis results in JavaScript execution on the Miniflux instance as soon as the user is convinced (e.g. by a message in the alt text) to open the broken image.\n\nAn attacker can execute arbitrary JavaScript in the context of a victim Miniflux user when they open a broken image in a crafted RSS feed. This can be used to perform actions on the Miniflux instance as that user and gain administrative access to the Miniflux instance if it is reachable and the victim is an administrator.\n\nA patch is available in version 2.0.43. 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Since v2.0.25, Miniflux will automatically proxy images served over HTTP to prevent mixed content errors. \n\nWhen an outbound request made by the Go HTTP client fails, the `html.ServerError` is returned unescaped without the expected Content Security Policy header added to valid responses.\n\nBy creating an RSS feed item with the inline description containing an `<img>` tag with a `srcset` attribute pointing to an invalid URL like `http:a<script>alert(1)</script>`, we can coerce the proxy handler into an error condition where the invalid URL is returned unescaped and in full.\n\nThis results in JavaScript execution on the Miniflux instance as soon as the user is convinced (e.g. by a message in the alt text) to open the broken image.\n\nAn attacker can execute arbitrary JavaScript in the context of a victim Miniflux user when they open a broken image in a crafted RSS feed. This can be used to perform actions on the Miniflux instance as that user and gain administrative access to the Miniflux instance if it is reachable and the victim is an administrator.\n\nA patch is available in version 2.0.43. As a workaround sisable image proxy; default value is `http-only`.","state":0,"publishedAt":"2023-03-17T20:15:13.283+00:00","modifiedAt":"2026-06-17T05:45:32.42+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N","score":4.8,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L76","https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L90","https://github.com/miniflux/v2/pull/1746","https://github.com/miniflux/v2/releases/tag/2.0.25","https://github.com/miniflux/v2/releases/tag/2.0.43","https://github.com/miniflux/v2/security/advisories/GHSA-mqqg-xjhj-wfgw","https://miniflux.app/docs/configuration.html#proxy-images"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-27592","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-79"],"productCriteria":["cpe:2.3:a:miniflux_project:miniflux:*:*:*:*:*:go:*:*"],"sourceDates":{"published":"2023-03-17T20:15:13.283","lastModified":"2026-06-17T05:45:32.420"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2023-27592","identifiers":["CVE-2023-27592"]},"retained":false,"historicalAffected":[]},{"revision":"713d3c60260b469f84ebeadbbd050437","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-mqqg-xjhj-wfgw","aliases":["CVE-2023-27592"],"title":"Stored XSS in Miniflux when opening a broken image due to unescaped ServerError in proxy handler","description":"### Impact\n\nSince [v2.0.25](https://github.com/miniflux/v2/releases/tag/2.0.25), Miniflux will automatically [proxy](https://miniflux.app/docs/configuration.html#proxy-images) images served over HTTP to prevent mixed content errors.\n\nWhen an outbound request made by the Go HTTP client fails, the `html.ServerError` is [returned](https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L76) unescaped without the expected Content Security Policy [header](https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L90) added to valid responses.\n\nBy creating an RSS feed item with the inline description containing an `<img>` tag with a `srcset` attribute pointing to an invalid URL like `http:a<script>alert(1)</script>`, we can coerce the proxy handler into an error condition where the invalid URL is returned unescaped and in full.\n\nThis results in JavaScript execution on the Miniflux instance as soon as the user is convinced (e.g. by a message in the alt text) to open the broken image.\n\n\nAn attacker can execute arbitrary JavaScript in the context of a victim Miniflux user when they open a broken image in a crafted RSS feed. This can be used to perform actions on the Miniflux instance as that user and gain administrative access to the Miniflux instance if it is reachable and the victim is an administrator.\n\n### Patches\n\nPR #1746 fixes the problem. Available in Miniflux >= 2.0.43.\n\n### Workarounds\n\n- Disable image proxy (default value is `http-only`).\n\n### References\n\n- https://miniflux.app/docs/configuration.html#proxy-images","state":0,"publishedAt":"2025-04-02T17:25:15+00:00","modifiedAt":"2026-09-10T03:50:57.3940782+00:00","affected":[{"ecosystem":"Go","name":"miniflux.app/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.0.25"},{"kind":"fixed","version":"2.0.43"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/miniflux/v2/security/advisories/GHSA-mqqg-xjhj-wfgw","https://nvd.nist.gov/vuln/detail/CVE-2023-27592","https://github.com/miniflux/v2/pull/1746","https://github.com/miniflux/v2","https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L76","https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L90","https://github.com/miniflux/v2/releases/tag/2.0.25","https://github.com/miniflux/v2/releases/tag/2.0.43","https://miniflux.app/docs/configuration.html#proxy-images"],"sourceUrl":"https://github.com/advisories/GHSA-mqqg-xjhj-wfgw","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-mqqg-xjhj-wfgw","identifiers":["GHSA-mqqg-xjhj-wfgw","CVE-2023-27592"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-15T12:00:55.3946839+00:00","complete":true,"records":1781,"lastAttemptAt":"2026-11-15T12:00:55.3946839+00:00","lastSuccessAt":"2026-11-15T12:00:55.579435+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:55.5794357+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-7de4d7559a5263003f03d9f70577ab06f92ba4178309f26fce53e22a4a959294-9f2801eea6d0b63da2583193add6be220e1b53bbbe4ef94b9346425ef1596ca8","complete":true,"records":425788,"lastAttemptAt":"2026-11-15T12:00:54.4294537+00:00","lastSuccessAt":"2026-11-15T12:00:54.4082037+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:54.4294537+00:00","snapshotPublishedAt":"2026-11-15T11:26:58+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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Not a global EPSS backfill.","generation":"2026-11-15T12:00:55.3946839+00:00","complete":true,"records":1125,"lastAttemptAt":"2026-11-15T12:00:55.3946839+00:00","lastSuccessAt":"2026-11-15T12:00:55.580236+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:55.580236+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-d33b5144615b488f88b7a7390696bc39","complete":false,"records":13833,"lastAttemptAt":"2026-11-15T12:01:03.1788889+00:00","lastSuccessAt":"2026-11-15T10:02:36.038+00:00","error":"1 identifier lookups failed; latest failures include HttpError (HTTP 503). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-15T10:02:36.038+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13873,"expectedIdentifiers":13874,"failedIdentifiers":1},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-64eea06dbd27de8464d5dbce1b78cc794cc59e2d901516ae0d3ea76e624cdae0","complete":true,"records":9955,"lastAttemptAt":"2026-11-15T12:00:55.0947737+00:00","lastSuccessAt":"2026-11-14T13:57:23.1208135+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:55.0947737+00:00","snapshotPublishedAt":"2026-11-14T13:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-f4424d7d4861b1af1404bd15abcb83f295dcd003412a9340ca99dc8200aa148a","complete":true,"records":2014,"lastAttemptAt":"2026-11-15T12:00:54.588948+00:00","lastSuccessAt":"2026-11-13T19:57:08.2864435+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:54.588948+00:00","snapshotPublishedAt":"2026-11-13T19:33:10+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-6086d649bcb454cdf302d7d9275177bda73550e1b6e446b3520e9b6266d3582c","complete":true,"records":3148,"lastAttemptAt":"2026-11-15T12:00:55.3229475+00:00","lastSuccessAt":"2026-11-15T11:05:17.1034234+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:55.3229475+00:00","snapshotPublishedAt":"2026-11-15T10:03:04+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-ff18f36f13fcca3a20a3fb9274b59b8872d18869a99071730e1e79b625c8f612","complete":true,"records":232475,"lastAttemptAt":"2026-11-15T12:00:54.6916951+00:00","lastSuccessAt":"2026-11-15T11:05:10.4195883+00:00","error":null,"lastVerifiedAt":"2026-11-15T12:00:54.6916951+00:00","snapshotPublishedAt":"2026-11-15T10:33:06+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}