CVE-2025-5892: rocket.chat DoS — Exploit & Fix

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.

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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
rocket.chat	rocket.chat	< 7.6.1

References

Advisories & Patches

https://github.com/RocketChat/Rocket.Chat/pull/35711 https://github.com/RocketChat/Rocket.Chat/pull/35711

Exploits

https://github.com/RocketChat/Rocket.Chat/pull/35711 https://github.com/RocketChat/Rocket.Chat/pull/35711

Other References

https://gist.github.com/mmmsssttt404/0fcda3b3e85edafc4eaa6816aa252deb https://vuldb.com/?ctiid.311663 https://vuldb.com/?id.311663 https://vuldb.com/?submit.585751

Frequently Asked Questions

What is CVE-2025-5892? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-5892? +

CVE-2025-5892 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-2025-5892? +

CVE-2025-5892 affects products from rocket.chat, specifically: rocket.chat. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-5892? +

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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