CVE-2023-45367

mediumpriority · track · 26EPSS 0.007 · 51 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.66% (51st) EPSS

CVSS 6.5 · medium

Is it mine?

12 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-28

An issue was discovered in the CheckUser extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. A user can use a rest.php/checkuser/v0/useragent-clienthints/revision/ URL to store an arbitrary number of rows in cu_useragent_clienthints, leading to a denial of service.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-404US

affected products (12)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
n/a n/a≤ n/aenisa_euvdEU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
Сообщество свободного программного обеспечения MediaWiki≤ 1.35.12fstec_bduRU
Сообщество свободного программного обеспечения MediaWiki≤ 1.40.0fstec_bduRU
Сообщество свободного программного обеспечения MediaWiki1.36.0 → 1.39.5fstec_bduRU
mediawiki mediawiki< 1.35.12nvdUScpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
mediawiki mediawiki1.36.0 → 1.39.5nvdUScpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
mediawiki mediawiki= 1.40.0nvdUScpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
Bitnami mediawiki< 1.35.12osvUSpkg:bitnami/mediawiki
Bitnami mediawiki1.36.0 → 1.39.5osvUSpkg:bitnami/mediawiki
Bitnami mediawiki1.40.0 → 1.40.1osvUSpkg:bitnami/mediawiki

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2594MediaWiki: Mehre SchwachstellenDeutsch2023-10-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in MediaWiki ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen, Dateien zu manipulieren, Cross-Site-Scripting-Angriffe durchzuführen oder vertrauliche Informationen offenzulegen.
BIT-mediawiki-2023-453672024-03-06vendor · osvUS
An issue was discovered in the CheckUser extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. A user can use a rest.php/checkuser/v0/useragent-clienthints/revision/ URL to store an arbitrary number of rows in cu_useragent_clienthints, leading to a denial of service.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2023-10-09modified 2026-06-17

references (4)

External citations — patches, advisories, analysis.

https://cxsecurity.com/cveshow/CVE-2023-45367/cnnvd
https://phabricator.wikimedia.org/T344923 cnnvd
https://phabricator.wikimedia.org/T344923 enisa_euvd
https://phabricator.wikimedia.org/T344923ExploitIssue TrackingVendor Advisorynvd

scry

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