CVE-2025-21505: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Components Services). 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 Se

CSIRTS triage

vendor: Oracle product: MySQL ServerOtheraffected: 8.0.40 and prior, 8.4.3 and prior, 9.1.0 and prior

What: Unspecified vulnerability in MySQL Server Components Services requiring high privilege network access.
Who is affected: MySQL 8.0.40, 8.4.3, and 9.1.0 and earlier deployments with high-privileged accounts accessible over network.
Urgency: Medium priority; requires high privilege and network access, limiting practical exploitation scope.
Action: Upgrade to MySQL 8.0.41, 8.4.4, 9.1.1 or later to patch the Components Services vulnerability.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Moderate exploitation riskCVE-2025-215051.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 62% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2025-21505	coverage & exploitation status	NVD · CVE.org