CVE-2024-34507

7.4 HIGH 0.7% exploit odds Fix listed

What it is

An issue was discovered in includes/CommentFormatter/CommentParser.php in MediaWiki before 1.39.7, 1.40.x before 1.40.3, and 1.41.x before 1.41.1. XSS can occur because of mishandling of the 0x1b character, as demonstrated by Special:RecentChanges#%1b0000000.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure.
Exploit odds: 0.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2024-05-05 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 07:33 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.7% in the next 30 days (EPSS).
Severity: 7.4 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2024-05-05 19:15 UTC
Last modified: 2026-06-17 07:33 UTC
Exploit probability: 0.7% · EPSS, next 30 days
Weakness: CWE-80
Record status: Modified

Affected

Mediawiki < 1.39.7
Mediawiki < 1.40.3
Mediawiki < 1.41.1
Fedoraproject Fedora 40

Attack profile CVSS 3.1 · 7.4

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Scope: Changed
Confidentiality: High
Integrity: None
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2024-34507.md and follow it. Check whether this project is affected by CVE-2024-34507. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record