CVE-2023-23917: Rocket.chat

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

A prototype pollution vulnerability exists in Rocket.Chat server <5.2.0 that could allow an attacker to a RCE under the admin account. Any user can create their own server in your cloud and become an admin so this vulnerability could affect the cloud infrastructure. This attack vector also may increase the impact of XSS to RCE which is dangerous for self-hosted users as well.

Affected products

• Rocket.chat Rocket.chat: before 5.2.0 (fixed in 5.2.0)

Published 2023-02-23. Last modified 2026-06-17.