CVE-2025-5892 RocketChat parseMessage.js parseMessage redos
Remote attackers can cause denial of service in RocketChat via inefficient regular expression complexity in the IRC message parser.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-5892?
CVE-2025-5892 is a medium-severity denial of service vulnerability in Rocket.chat Rocket.chat, 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, which was classified as problematic, has been found in RocketChat up to 7.6.1. This issue affects the function parseMessage of the file /apps/meteor/app/irc/server/servers/RFC2813/parseMessage.js. The manipulation of the argument line leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Which versions are affected by CVE-2025-5892?
It affects 1 product.
Products include Rocket.chat Rocket.chat.
How do I fix CVE-2025-5892?
No fix has been published for CVE-2025-5892 yet. Limit exposure of the affected software until one is available.
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-2025-5892 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5892 exists.
Other vulnerabilities in Rocket.chat Rocket.chat
Sources
Also known as GHSA-prxp-75xx-3cxw.