---
id: CVE-2026-52773
title: YesWiki is a wiki system written in PHP
summary: >-
  YesWiki is a wiki system written in PHP. From version 4.1.0 to before version
  4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a
  hidden HTML input in handlers/page/show.php without escaping. Because MySQL
  coer…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-80
vendor: YesWiki
product: yeswiki
affected:
  - 'yeswiki >= 4.1.0, < 4.6.6'
patched:
  - yeswiki/yeswiki 4.6.6
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:05:26.920'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52773'
references:
  - url: >-
      https://github.com/YesWiki/yeswiki/commit/35ad9c2bb6cd338198b37c1f745e24bc302a3560
    label: security-advisories@github.com
  - url: 'https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6'
    label: security-advisories@github.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-35f3-pg38-486f'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-35f3-pg38-486f'
tags:
  - nvd
  - exploit-available
  - cve.org
  - ghsa
  - composer
epss: 0.00591
epssPercentile: 0.45968
exploits:
  nuclei:
    - CVE-2026-52773
  checkedAt: '2026-09-26T09:05:48.061Z'
exploitAvailable: true
aliases:
  - GHSA-35f3-pg38-486f
ecosystem: composer
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T18:02:44.976916Z'
ingestedAt: '2026-07-09T21:52:34.674Z'
---

## Overview

YesWiki is a wiki system written in PHP. From version 4.1.0 to before version 4.6.6, YesWiki's archived-revision view reflects the time GET parameter into a hidden HTML input in handlers/page/show.php without escaping. Because MySQL coerces malformed DATETIME strings, an attacker can append HTML or JavaScript to a valid archived revision timestamp, still load that archived revision, and execute arbitrary JavaScript in the victim's browser. The vulnerable form is only rendered when the victim can both read and edit the target page. In restricted deployments this requires a victim with read and write access to that page. On a default doryphore 4.6.5 install, public pages such as PagePrincipale were editable anonymously during validation, so the issue can also affect unauthenticated visitors in that configuration. This issue has been patched in version 4.6.6.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-52773)

Affected packages:

- `yeswiki/yeswiki >= 4.1.0, < 4.6.6`

Patched in:

- `yeswiki/yeswiki 4.6.6`

Source: https://github.com/advisories/GHSA-35f3-pg38-486f