CVE-2025-59938: wazuh Heap Overflow — Exploit & Fix

Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions starting from 3.8.0 to before 4.11.0, wazuh-analysisd is vulnerable to a heap buffer overflow when parsing XML elements from Windows EventChannel messages. This issue has been patched in version 4.11.0.

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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
wazuh	wazuh	3.8.0 — 4.11.0

References

Advisories & Patches

https://github.com/wazuh/wazuh/security/advisories/GHSA-vw3r-mjg3-9hh2

Exploits

https://github.com/wazuh/wazuh/security/advisories/GHSA-vw3r-mjg3-9hh2

Frequently Asked Questions

What is CVE-2025-59938? +

Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions starting from 3.8.0 to before 4.11.0, wazuh-analysisd is vulnerable to a heap buffer overflow when parsing XML elements from Windows EventChannel messages. This issue has been patched in version 4.11.0. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-59938? +

CVE-2025-59938 has a CVSS v3.1 score of 6.5 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-2025-59938? +

CVE-2025-59938 affects products from wazuh, specifically: wazuh. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59938? +

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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