CVE-2025-21555 Missing authorization in MySQL Server
High-privileged attackers can cause MySQL Server crashes and modify data due to missing authorization checks in InnoDB.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21555?
CVE-2025-21555 is a medium-severity missing authorization vulnerability in Oracle Mysql Server, published on 21 Jan 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.40 and prior, 8.4.3 and prior and 9.1.0 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server as well as unauthorized update, insert or delete access to some of MySQL Server accessible data. CVSS 3.1 Base Score 5.5 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).
Weakness: CWE-863
Which versions are affected by CVE-2025-21555?
It affects 1 product.
Products include Oracle Mysql Server.
How do I fix CVE-2025-21555?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-21555 being exploited?
There is no known exploitation of CVE-2025-21555 in the wild and no public exploit code.
Other vulnerabilities in Oracle Mysql Server
Sources
Also known as GHSA-gc8h-qjvm-5f2g, MINI-hfw9-qvvp-h43p, MINI-qqg7-j32p-85jj, MINI-x2vj-fvmr-mv66, UBUNTU-CVE-2025-21555.