CVE-2025-5891: A vulnerability classified as problematic was found in Unitech pm2 up to 6.0.6

Q: How do I fix CVE-2025-5891?

pm2: upgrade to newer than 6.0.6. Exact commands for each OS are on this page.

Q: Is CVE-2025-5891 being exploited?

CVE-2025-5891 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-5891 affect?

CVE-2025-5891 affects pm2. Severity is medium (CVSS 4.3). 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

Q: How urgent is CVE-2025-5891?

Priority 33/100. Public exploit reference

Routine

MEDIUM 4.3UPGRADE

CVE-2025-5891 is a medium-severity flaw (CVSS 4.3) affecting pm2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-400, CWE-1333
Published	2025-06-09
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: keymetric

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-09 19:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

keymetric pm2 UPGRADE

Affected: <= 6.0.6

Fixed in: newer than 6.0.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pm2 || rpm -q pm2 || pm2 --version

2. UPGRADE to newer than 6.0.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pm2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pm2

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-5891?

pm2: upgrade to newer than 6.0.6. Exact commands for each OS are on this page.

Is CVE-2025-5891 being exploited?

CVE-2025-5891 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-5891 affect?

CVE-2025-5891 affects pm2. Severity is medium (CVSS 4.3). 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

How urgent is CVE-2025-5891?

Priority 33/100. Public exploit reference

References

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