CVE-2026-52774
mediumYesWiki is a wiki system written in PHP.
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki's Bazar widget handler reflects the id GET parameter into HTML attributes using strip_tags() only. Because strip_tags() does not escape double quotes, an attacker can break out of the attribute value, inject an event handler such as onmouseover, and execute arbitrary JavaScript in the victim's browser. This issue is reachable without authentication. During validation, the vulnerable widget route returned the injected HTML for both /HomePage/widget?id=... and /NoSuchPage/widget?id=..., which shows that no login, no page ownership, no edit rights, and not even a valid page tag were required. The only routing prerequisite observed was that the Bazar extension is enabled and the request includes an id parameter. This issue has been patched in version 4.6.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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/1aa2710c7505630b858f2142a65f9441bfaba2b2 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-r5xw-gcgw-hwp5 security-advisories@github.com
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-r5xw-gcgw-hwp5 134c704f-9b21-4f2e-91b3-4a467353bcc0