Vulnerability · Published Apr 27, 2026 · Assigned by VulnCheck

CVE-2026-41466ProjeQtor < 12.4.4 Stored XSS via checkValidHtmlText()

Medium 5.4

In plain English

A medium-severity cross-site scripting in ProjeQtor from ProjeQtor. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 92.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

ProjeQtor versions 7.0 through 12.4.3 contain a stored cross-site scripting vulnerability in the checkValidHtmlText() function within Security.php that fails to properly sanitize user input by only detecting specific patterns while returning unsanitized strings without output encoding. Attackers can inject malicious payloads that bypass the filter using alternative syntax such as img tags with event handlers, which are stored and executed in the browsers of users viewing the affected content.

Affected products (as reported)

Vendor	Product	Versions
ProjeQtor	ProjeQtor	7.0 – through 12.4.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

https://damiri.fr/en/cves/CVE-2026-41466 technical-description, exploit
https://gryfman.fr/cves/CVE-2026-41466 technical-description, exploit
https://www.projeqtor.com product
https://www.vulncheck.com/advisories/projeqtor-stored-xss-via-checkvalidhtmltext third-party-advisory