CVE-2025-46346: yeswiki XSS — Exploit & Fix

Description

YesWiki is a wiki system written in PHP. Prior to version 4.5.4, a stored cross-site scripting (XSS) vulnerability was discovered in the application’s comments feature. This issue allows a malicious actor to inject JavaScript payloads that are stored and later executed in the browser of any user viewing the affected comment. The XSS occurs because the application fails to properly sanitize or encode user input submitted to the comments. Notably, the application sanitizes or does not allow execution of `<script>` tags, but does not account for payloads obfuscated using JavaScript block comments like `/* JavaScriptPayload */`. This issue has been patched in version 4.5.4.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
yeswiki	yeswiki	< 4.5.4

References

Advisories & Patches

https://github.com/YesWiki/yeswiki/commit/0d4efc880a727599fa4f6d7a64cc967afe475530 https://github.com/YesWiki/yeswiki/security/advisories/GHSA-59x8-cvxh-3mm4 https://github.com/YesWiki/yeswiki/security/advisories/GHSA-59x8-cvxh-3mm4

Exploits

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-59x8-cvxh-3mm4 https://github.com/YesWiki/yeswiki/security/advisories/GHSA-59x8-cvxh-3mm4

Frequently Asked Questions

What is CVE-2025-46346? +

YesWiki is a wiki system written in PHP. Prior to version 4.5.4, a stored cross-site scripting (XSS) vulnerability was discovered in the application’s comments feature. This issue allows a malicious actor to inject JavaScript payloads that are stored and later executed in the browser of any user viewing the affected comment. The XSS occurs because the application fails to properly sanitize or encode user input submitted to the comments. Notably, the application sanitizes or does not allow execution of `<script>` tags, but does not account for payloads obfuscated using JavaScript block comments like `/* JavaScriptPayload */`. This issue has been patched in version 4.5.4. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-46346? +

CVE-2025-46346 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-46346? +

CVE-2025-46346 affects products from yeswiki, specifically: yeswiki. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-46346? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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