CVE-2023-45360

Name: CVE-2023-45360
Creator: NVD / NIST
Published: 2023-11-03T05:15:30.73+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2023-45360 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An issue was discovered 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. There is XSS in youhavenewmessagesmanyusers and youhavenewmessages i18n messages. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

An issue was discovered 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. There is XSS in youhavenewmessagesmanyusers and youhavenewmessages i18n messages. This is related to MediaWiki:Youhavenewmessagesfromusers.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.57%

42.7th 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	>= 1.39.0, < 1.39.5
Mediawiki	Mediawiki	1.40.0

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
https://phabricator.wikimedia.org/T340221Exploit, Issue Tracking, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
https://phabricator.wikimedia.org/T340221Exploit, Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Nov 3, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45360?

How severe is CVE-2023-45360?

CVE-2023-45360 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45360?

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-2023-45360?

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

Scan your code now

Source: NVD / NIST