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CVE-2026-100522

Cotonti through 1.0.0 Reflected XSS via message.php lng parameter

CVSS 4.0 5.1 MEDIUMCVSS 3.1 6.1 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-100522

Published

Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in message.php where the lng parameter is not properly escaped before output in the confirmation dialog. Unauthenticated attackers can craft malicious links with script payloads in the lng parameter to execute arbitrary JavaScript in victim browser sessions.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-100522

Published

Cotonti

Vendor product

Publisher's version information

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

{
                    "vendor": "Cotonti",
                    "product": "Cotonti",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:composer/cotonti/cotonti",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "1.0.0",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ],
                    "repo": "https://github.com/Cotonti/Cotonti",
                    "programFiles": [
                        "message.php"
                    ]
                }

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