Improper Encoding or Escaping of Output Affecting yeswiki/yeswiki package, versions <4.6.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-YESWIKIYESWIKI-17913362
- published9 Jul 2026
- disclosed9 Jul 2026
- creditUnknown
Introduced: 9 Jul 2026
CVE-2026-52772 (opens in a new tab)How to fix?
Upgrade yeswiki/yeswiki to version 4.6.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output in the rendering of form field labels and hints within templates due to improper output escaping. An attacker can execute arbitrary JavaScript code in the context of users viewing affected forms by injecting malicious content into field.label or field.hint through form definitions. This allows theft of session cookies, modification of page content, or phishing attacks against any visitor, including unauthenticated users. This is only exploitable if the attacker has privileges to create or edit form definitions with the required access control level.