🚨 CVE-2026-52773
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.
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GitHub
fix(bazar): GHSA-35f3-pg38-486f · YesWiki/yeswiki@35ad9c2
YesWiki is a wiki system written in PHP, including extensions making collaboration more simple (databases, maps, easy editing, bootstrap themes,...). - fix(bazar): GHSA-35f3-pg38-486f · YesWiki/yeswiki@35ad9c2
September 5, 2026 8 1
