# CVE-2026-34598

## Summary

- **CVE ID:** CVE-2026-34598
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-79, CWE-87
- **Published:** Apr 2, 2026
- **Last Modified:** Apr 3, 2026

## Description

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.

## Affected Products

- YesWiki — yeswiki (< 4.6.0)

## References

- [CNA](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-37fq-47qj-6j5j)
- [CNA](https://github.com/YesWiki/yeswiki/releases/tag/v4.6.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 11.6

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._