CVE-2026-52766
criticalYesWiki is a wiki system written in PHP.
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the {{erasespamedcomments}} wiki action (actions/EraseSpamedCommentsAction.php) accepts a suppr[] array from POST and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (default_write_acl='*') on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users. This issue has been patched in version 4.6.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/YesWiki/yeswiki/commit/ed5b548a705c8091ba0282aaaba73ddda976abef security-advisories@github.com
- https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6 security-advisories@github.com
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x security-advisories@github.com
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-6x7x-gcmf-7r8x 134c704f-9b21-4f2e-91b3-4a467353bcc0