13-Year-Old Redis Flaw Exposed: CVSS 10.0 Vulnerability Lets Attackers Run Code Remotely
Oct 07, 2025
Vulnerability / Cloud Security
Redis has disclosed details of a maximum-severity security flaw in its in-memory database software that could result in remote code execution under certain circumstances. The vulnerability, tracked as CVE-2025-49844 (aka RediShell), has been assigned a CVSS score of 10.0. "An authenticated user may use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free, and potentially lead to remote code execution," according to a GitHub advisory for the issue. "The problem exists in all versions of Redis with Lua scripting." However, for exploitation to be successful, it requires an attacker to first gain authenticated access to a Redis instance, making it crucial that users don't leave their Redis instances exposed to the internet and secure them with strong authentication. The issue impacts all versions of Redis. It has been addressed in versions 6.2.20, 7.2.11, 7.4.6, 8.0.4, and 8.2.2 released on October 3, 2025. As tempor...
