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Mysql ServerDatabase / datastore · Oracle

CVE-2025-21577

MEDIUM · 6.5 CVSS v3.1 Published 2025-04-15
Fix available
A fix is available. Upgrade to after 9.2.0 or later.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.0-8.0.41, 8.4.0-8.4.4 and 9.0.0-9.2.0. Easily exploitable vulnerability allows low 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-400

A single request can consume unbounded CPU, memory, or connections, so a modest amount of malicious traffic exhausts the service. The result is denial of service for everyone else. Remediation is enforcing limits, quotas, and timeouts on what any one request can use.

General guidance for the uncontrolled resource consumption class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Mysql ServerDatabase / datastore
Affected:>= 8.0.0, <= 8.0.41>= 8.4.0, <= 8.4.4>= 9.0.0, <= 9.2.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 9.2.0
Vendor patch www.oracle.com →
Recommended fix Moderate confidence

MySQL 8.0.42+ (for 8.0.x branch), MySQL 8.4.5+ (for 8.4.x branch), or MySQL 9.3.0+ (for 9.x branch)

  1. 1. Determine your current MySQL Server version using: SELECT VERSION();
  2. 2. For MySQL 8.0.x users: Upgrade to MySQL 8.0.42 or later (8.0.41 is the last affected version in this branch)
  3. 3. For MySQL 8.4.x users: Upgrade to MySQL 8.4.5 or later (8.4.4 is the last affected version in this branch)
  4. 4. For MySQL 9.0.x-9.2.x users: Upgrade to MySQL 9.3.0 or later (9.2.0 is the last affected version in this branch)
  5. 5. Download the appropriate MySQL Server release from https://dev.mysql.com/downloads/mysql/
  6. 6. Review MySQL upgrade documentation at https://dev.mysql.com/doc/refman/8.0/en/upgrading.html before performing the upgrade
  7. 7. Perform a full backup of all databases before upgrading
  8. 8. Test the upgrade in a non-production environment first
Caveat Review Oracle's upgrade notes - minor version upgrades within same release series typically safe but always test in staging first

Generated from the published advisory — verify against the referenced sources before acting.

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-21577 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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