CVE-2025-5891: pm2 DoS — Exploit & Fix

Description

A vulnerability classified as problematic was found in Unitech pm2 up to 6.0.6. This vulnerability affects unknown code of the file /lib/tools/Config.js. The manipulation leads to inefficient regular expression complexity. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

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CVSS v3.1 Score

4.3

MEDIUM

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

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-1333 CWE-1333

Affected Products

Vendor	Product	Versions
keymetric	pm2	< 6.0.6

References

Advisories & Patches

https://github.com/Unitech/pm2/pull/5971 https://github.com/Unitech/pm2/pull/5971

Exploits

https://github.com/Unitech/pm2/pull/5971 https://github.com/Unitech/pm2/pull/5971

Other References

https://gist.github.com/mmmsssttt404/407e2ffe3e0eaa393ad923a86316a385 https://vuldb.com/?ctiid.311662 https://vuldb.com/?id.311662 https://vuldb.com/?submit.585750

Frequently Asked Questions

What is CVE-2025-5891? +

A vulnerability classified as problematic was found in Unitech pm2 up to 6.0.6. This vulnerability affects unknown code of the file /lib/tools/Config.js. The manipulation leads to inefficient regular expression complexity. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-5891? +

CVE-2025-5891 has a CVSS v3.1 score of 4.3 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-2025-5891? +

CVE-2025-5891 affects products from keymetric, specifically: pm2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-5891? +

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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