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CVE-2025-24017: YesWiki Vulnerable to Unauthenticated DOM Based XSS

7.6 CVSS

Description

YesWiki is a wiki system written in PHP. Versions up to and including 4.4.5 are vulnerable to any end-user crafting a DOM based XSS on all of YesWiki's pages which is triggered when a user clicks on a malicious link. The vulnerability makes use of the search by tag feature. When a tag doesn't exist, the tag is reflected on the page and isn't properly sanitized on the server side which allows a malicious user to generate a link that will trigger an XSS on the client's side when clicked. This vulnerability allows any user to generate a malicious link that will trigger an account takeover when clicked, therefore allowing a user to steal other accounts, modify pages, comments, permissions, extract user data (emails), thus impacting the integrity, availability and confidentiality of a YesWiki instance. Version 4.5.0 contains a patch for the issue.

Classification

CVE ID: CVE-2025-24017

CVSS Base Severity: HIGH

CVSS Base Score: 7.6

Affected Products

Vendor: YesWiki

Product: yeswiki

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.7% (scored less or equal to compared to others)

EPSS Date: 2025-02-19 (when was this score calculated)

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-wphc-5f2j-jhvg
https://github.com/YesWiki/yeswiki/commit/c1e28b59394957902c31c850219e4504a20db98b

Timeline