CVE-2026-52772: YesWiki: Bazar form-field templates still apply `|raw('html')` to `field.label` / `field.hint` in attribute and label-body contexts — stored XSS in form renders (sibling class of commit `e6b66aa`)

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-05 · updated 2026-09-09
Weakness: CWE-79

Description

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, Bazar form-field templates still apply |raw('html') to field.label / field.hint in attribute and label-body contexts, resulting stored XSS in form renders. This issue has been patched in version 4.6.6.

Affected products

yeswiki: before 4.6.6

References

https://github.com/YesWiki/yeswiki/commit/5d1a4d07fecb0706f33e5dfbbe6ff5ef1892b2a7
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-xc7j-3g8q-9vh4
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-xc7j-3g8q-9vh4

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