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CVE-2026-88997

JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-88997

Published

The JSM Show Post Metadata WordPress plugin before 4.9.1 does not properly escape a post meta key before outputting it into an inline event-handler attribute in an admin-facing meta box, allowing users with contributor-level access and above to inject arbitrary JavaScript that executes in the session of a higher-privileged user who reviews the affected post.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-88997

Published

JSM Show Post Metadata

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Unknown",
                    "product": "JSM Show Post Metadata",
                    "versions": [
                        {
                            "status": "affected",
                            "versionType": "semver",
                            "version": "0",
                            "lessThan": "4.9.1"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON