EUVD-2026-365879

fkie_cve-2026-52772

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.

GHSA-xc7j-3g8q-9vh4 — YesWiki has stored XSS in Bazar form-field templates via unescaped field.label / field.hint (|raw('html'))

Affected: Packagist: yeswiki/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`)

**CWE**: CWE-79 (Improper Neutralization of Input During Web Page Generation, "Cross-site Scripting") via CWE-116 (Improper Encoding or Escaping of Output) — same class as the partial fix at commit `e6b66aa`

**CVSS v3.1**: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N` → 4.7 (Medium)

(Privileges Required = High because writing the field definitions requires `saisie_formulaire`, which `tools/bazar/services/Guard.php:58-61` grants only to admins by default; Scope = Changed because the XSS payload set by a form-editor admin executes in the origin context of arbitrary viewers, including unauthenticated visitors.)

## Summary

Commit `e6b66aa` ("fix(bazar): leave the twig escape placeholder as is", 2026-05-19) recognised that emitting `field.label` through Twig's `raw('html')` filter into an HTML attribute is unsafe — Twig's `raw` marker suppresses the attribute auto-escape, `striptags` removes `<…>` tags but not `"`, so a label containing `"` can break out of the attribute and inject event-handler attributes. The commit fixed `tools/bazar/templates/inputs/text.twig:19` and `tools/bazar/templates/inputs/textarea.twig:3`.

At least seven additional templates have the same pattern and were not touched by the fix:

- `tools/bazar/templates/inputs/range.twig:19` — `placeholder="{{ field.label|r…

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EUVD-2026-365879

fkie_cve-2026-52772

GHSA-xc7j-3g8q-9vh4 — YesWiki has stored XSS in Bazar form-field templates via unescaped field.label / field.hint (|raw('html'))