Cross-Site Scripting Vulnerability in YesWiki Software
CVE-2026-52773

6.1MEDIUM

Key Information:

Vendor

Yeswiki

Status
Yeswiki
Vendor
CVE Published:
4 September 2026

What is CVE-2026-52773?

YesWiki, a PHP-based wiki system, has a vulnerability that exposes users to cross-site scripting (XSS) attacks. This flaw resides in the archived-revision view, where the system reflects a GET parameter directly into a hidden HTML input without proper escaping. As a result, an attacker can manipulate valid archived revision timestamps to include malicious HTML or JavaScript code. This attack vector requires that the impacted user has permissions to both read and edit the affected page. In certain configurations, even unregistered users might exploit this vulnerability, particularly if public pages are editable without authentication. The issue was resolved in version 4.6.6, and users are urged to update to mitigate the risks associated with this vulnerability.

Affected Version(s)

yeswiki >= 4.1.0, < 4.6.6

References

https://github.com/YesWiki/yeswiki/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/YesWiki/yeswiki/commit/35ad9c2bb6cd338...
x_refsource_MISC
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
x_refsource_MISC

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.