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Fencer Vulns
medium 4.9

CVE-2025-21588 json

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML).

published 2025-04-15 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-11069

cvss
4.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). Supported versions that are affected are 8.4.0-8.4.4 and 9.0.0-9.2.0. 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. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Patch / fix

  • oracle mysql 8.4.5, 9.3.0
  • oracle mysql_server 8.4.5, 9.3.0
  • mysql-8.4 Ubuntu 25.10 8.4.5-0ubuntu1

ubuntu advisories UBUNTU-CVE-2025-21588

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mecab RHEL 9 0.996-3.module+el9.6.0+22713+cbf15e23.4
  • mysql RHEL 9 8.4.6-1.module+el9.6.0+23497+d0c5dcca
  • rapidjson RHEL 9 1.1.0-19.module+el9.6.0+22713+cbf15e23
  • mysql-libs RHEL 9 8.4.6-1.module+el9.6.0+23497+d0c5dcca
  • mysql-test RHEL 9 8.4.6-1.module+el9.6.0+23497+d0c5dcca
  • mecab-ipadic RHEL 9 2.7.0.20070801-24.module+el9.6.0+22713+cbf15e23
  • mysql-common RHEL 9 8.4.6-1.module+el9.6.0+23497+d0c5dcca
  • mysql-errmsg RHEL 9 8.4.6-1.module+el9.6.0+23497+d0c5dcca

red hat advisories RHSA-2025:16046RHSA-2025:15699

  • mecab AlmaLinux 9 0.996-3.module_el9.6.0+152+8cbce00c.4
  • mysql AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5
  • mysql-libs AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5
  • mysql-test AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5
  • mecab-ipadic AlmaLinux 9 2.7.0.20070801-24.module_el9.6.0+152+8cbce00c
  • mysql-common AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5
  • mysql-errmsg AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5
  • mysql-server AlmaLinux 9 8.4.6-1.module_el9.6.0+180+a4e757e5

almalinux advisories ALSA-2025:16046ALSA-2025:15699

  • mecab Rocky Linux 9 0.996-3.module+el9.7.0+40027+0df0d4e0.4
  • mysql Rocky Linux 9 8.4.6-1.module+el9.7.0+40027+0df0d4e0
  • rapidjson Rocky Linux 9 1.1.0-19.module+el9.7.0+40027+0df0d4e0
  • mecab-ipadic Rocky Linux 9 2.7.0.20070801-24.module+el9.7.0+40027+0df0d4e0
  • mysql8.4 Rocky Linux 10 8.4.6-2.el10_0
  • mysql-selinux Rocky Linux 10 1.0.14-1.el10_0

rocky linux advisories RLSA-2025:16046RLSA-2025:15699

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-21588 updated cvss 4.9

mysql: DML unspecified vulnerability (CPU Apr 2025)

  • Red Hat Enterprise Linux AppStream (v. 9) mysql 8.4.6-1.module+el9.6.0+23497+d0c5dcca, mecab 0.996-3.module+el9.6.0+22713+cbf15e23.4, mysql-libs 8.4.6-1.module+el9.6.0+23497+d0c5dcca, mysql-test 8.4.6-1.module+el9.6.0+23497+d0c5dcca, rapidjson 1.1.0-19.module+el9.6.0+22713+cbf15e23, mysql-common 8.4.6-1.module+el9.6.0+23497+d0c5dcca, +5 more
    fixed: vendor fix “Restrict network access to the MySQL Server to trusted clients only.” RHSA-2025:16046
  • Red Hat Enterprise Linux AppStream (v. 10) mysql8.4 8.4.6-2.el10_0, mysql8.4-libs 8.4.6-2.el10_0, mysql-selinux 1.0.14-1.el10_0, mysql8.4-common 8.4.6-2.el10_0, mysql8.4-errmsg 8.4.6-2.el10_0, mysql8.4-server 8.4.6-2.el10_0 Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) mysql8.4-test 8.4.6-2.el10_0, mysql8.4-test-data 8.4.6-2.el10_0
    fixed: vendor fix “Restrict network access to the MySQL Server to trusted clients only.” RHSA-2025:15699
  • Red Hat Enterprise Linux 6 mysql, mysql-libs, mysql-test, mysql-bench, mysql-server, mysql-embedded Red Hat Enterprise Linux 8 mecab, mysql, mysql-libs, mysql-test, mecab-ipadic, mysql-common, +4 more Red Hat Enterprise Linux 9 mysql, mysql-libs, mysql-test, mysql-common, mysql-errmsg, mysql-server
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Oracle Corporation MySQL Server

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.