EUVD-2026-24169

FreeScout is a free self-hosted help desk and shared mailbox. Versions prior to 1.8.213 have a stored cross-site scripting XSS vulnerability in the mailbox signature feature. The sanitization function Helper::stripDangerousTags app/Misc/Helper.php:568 uses an incomplete blocklist of only four HTM...

CVE-2026-40568

Summary (CVE-2026-40568) : FreeScout prior to version 1.8.213 contains a stored XSS in the mailbox signature due to incomplete HTML sanitization in Helper::stripDangerousTags(). The sanitizer blocks only four tags (script, form, iframe, object) and misses event-handler attributes, allowing HTML e...

CVE-2026-40568 FreeScout Vulnerable to XSS via Mailbox Signature Due to Incomplete HTML Sanitization

FreeScout is a free self-hosted help desk and shared mailbox. Versions prior to 1.8.213 have a stored cross-site scripting XSS vulnerability in the mailbox signature feature. The sanitization function Helper::stripDangerousTags app/Misc/Helper.php:568 uses an incomplete blocklist of only four HTM...

CVE-2026-40497 FreeScout Vulnerable to CSS Injection via Stored Style Tag in Mailbox Signature (CSRF Token Exfiltration)

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's Helper::stripDangerousTags removes , , , but does NOT strip tags. The mailbox signature field is saved via POST /mailbox/settings/id and later rendered unescaped via !!...

CVE-2026-40497 FreeScout Vulnerable to CSS Injection via Stored Style Tag in Mailbox Signature (CSRF Token Exfiltration)

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's Helper::stripDangerousTags removes , , , but does NOT strip tags. The mailbox signature field is saved via POST /mailbox/settings/id and later rendered unescaped via !!...

PT-2026-34012

FreeScout is a free self-hosted help desk and shared mailbox. Versions prior to 1.8.213 have a stored cross-site scripting XSS vulnerability in the mailbox signature feature. The sanitization function Helper::stripDangerousTags app/Misc/Helper.php:568 uses an incomplete blocklist of only four HTM...

PT-2026-33912

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's Helper::stripDangerousTags removes , , , but does NOT strip tags. The mailbox signature field is saved via POST /mailbox/settings/id and later rendered unescaped via !!...