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TI-2026-26845 Aliases CVE-2026-34598GHSA-37fq-47qj-6j5j

YesWiki has Persistant Blind XSS at "/?BazaR&vue=consulter"

Priority MEDIUM 64CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

YesWiki is a wiki system written in PHP. Prior to version 4.6.0, a stored and blind XSS vulnerability exists in the form title field. A malicious attacker can inject JavaScript without any authentication via a form title that is saved in the backend database. When any user visits that injected page, the JavaScript payload gets executed. This issue has been patched in version 4.6.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00221 12th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed yeswiki (YesWiki): 4.6.0yeswiki/yeswiki (Packagist): 4.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
YesWikiyeswikibefore 4.6.04.6.0Patch availableCNA
—yeswiki/yeswiki (Packagist)before 4.6.04.6.0Patch availableGHSA-37fq-47qj-6j5j
  • yeswiki VendorYesWiki Affected before 4.6.0 Fixed in 4.6.0 Patch available CNA
  • yeswiki/yeswiki (Packagist) Vendor— Affected before 4.6.0 Fixed in 4.6.0 Patch available GHSA-37fq-47qj-6j5j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yeswiki:yeswiki:*:*:*:*:*:*:*:*before 4.6.0VulnerableYesWiki
  • cpe:2.3:a:yeswiki:yeswiki:*:*:*:*:*:*:*:* Versions before 4.6.0 Vulnerable ·YesWiki

Remediation

  • Fix · CNA yeswiki (YesWiki) Fixed in 4.6.0
  • Fix · GHSA-37fq-47qj-6j5j yeswiki/yeswiki (Packagist) Fixed in 4.6.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34598
  2. 2026-10-03 Alias added: GHSA-37fq-47qj-6j5j

References

Exploit 1

Advisory 1

Other 2

  • TI-2025-29089 YesWiki Vulnerable to Unauthenticated Site Backup Creation and Download CVSS 3.1CRITICAL 10.0
  • TI-2024-34399 Use of a Broken or Risky Cryptographic Algorithm in YesWiki CVSS 3.1CRITICAL 9.9
  • TI-2025-22392 Path Traversal allowing arbitrary read of files in Yeswiki CVSS 3.1HIGH 8.6
  • TI-2025-17784 YesWiki Vulnerable to Unauthenticated DOM Based XSS CVSS 3.1HIGH 7.6
  • TI-2025-29087 YesWiki Vulnerable to Stored XSS in Comments CVSS 4.0MEDIUM 6.3
  • TI-2025-29090 YesWiki Vulnerable to Unauthenticated Reflected Cross-site Scripting CVSS 3.1HIGH 7.6
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences