CVE-2025-5891 Unitech pm2 Config.js redos
Remote attackers can cause denial of service in Unitech pm2 via inefficient regular expressions in the configuration module.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-5891?
CVE-2025-5891 is a medium-severity denial of service vulnerability in Unitech pm2, published on 9 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-5891?
2 open source packages ship an affected version, including pm2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pm2 npm | All versions | 7.0.0 |
pm2 npm | All versions | 7.0.0 |
Products include Keymetric Pm2.
How do I fix CVE-2025-5891?
Upgrade pm2 to 7.0.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-5891 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5891 exists.
Sources
Also known as GHSA-x5gf-qvw8-r2rm.