CVE-2024-34507

HIGH

7.4

CVSS Score

Published: May 5, 2024 at 12:00 AM UTC

Updated: June 17, 2026 at 07:33 AM UTC

2 products affected across 2 vendorsFedoraMediaWiki

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Severity

HIGH7.4

Exploit prediction

EPSS 0.7%

SSVC

PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora · Fedora Projectrpm

95%

MediaWiki · Mediawiki

95%

v < 1.39.71.40.0 ≤ v < 1.40.31.41.0 ≤ v < 1.41.1

Affected range stops below 1.39.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.40.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.41.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Vendor AdvisoryThird Party Advisory

Source: [email protected]

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/

ExploitIssue TrackingVendor Advisory

Source: [email protected]

https://phabricator.wikimedia.org/T355538

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-80

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