Vulnerability Description
YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML or JavaScript to a valid archived revision timestamp, still load that archived revision, and execute arbitrary JavaScript in the victim's browser. The vulnerable form is only rendered when the victim can both read and edit the target page. In restricted deployments this requires a victim with read and write access to that page. On a default doryphore 4.6.5 install, public pages such as PagePrincipale were editable anonymously during validation, so the issue can also affect unauthenticated visitors in that configuration. This issue has been patched in version 4.6.6.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/YesWiki/yeswiki/commit/35ad9c2bb6cd338198b37c1f745e24bc302a35
- https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-35f3-pg38-486f
FAQ
What is CVE-2026-52773?
CVE-2026-52773 is a vulnerability with a CVSS score of 6.1 (MEDIUM). YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php...
How severe is CVE-2026-52773?
CVE-2026-52773 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-52773?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.