CVE-2023-45363

Name: CVE-2023-45363
Creator: NVD / NIST
Published: 2023-10-09T05:15:09.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 22.70%

Last modified Jun 17, 2026

CVE-2023-45363 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.. EPSS estimates a 22.70% chance of exploitation in the next 30 days.

Description

An issue was discovered in ApiPageSet.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. It allows attackers to cause a denial of service (unbounded loop and RequestTimeoutException) when querying pages redirected to other variants with redirects and converttitles set.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

22.70%

97.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	< 1.35.12
Mediawiki	Mediawiki	>= 1.36.0, < 1.39.5
Mediawiki	Mediawiki	1.40.0
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0

References

https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
https://phabricator.wikimedia.org/T333050Exploit, Third Party Advisory, Vendor Advisory
https://www.debian.org/security/2023/dsa-5520Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
https://phabricator.wikimedia.org/T333050Exploit, Third Party Advisory, Vendor Advisory
https://www.debian.org/security/2023/dsa-5520Third Party Advisory

Timeline

Published: Oct 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45363?

How severe is CVE-2023-45363?

CVE-2023-45363 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 22.70% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45363?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45363?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST