CVE-2026-58030 PUBLISHED

SyntaxHighlight stored XSS via unsanitized 'linelinks' attribute

Assigner: wikimedia-foundation
Reserved: 27.06.2026 Published: 01.07.2026 Updated: 01.07.2026

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation SyntaxHighlight_GeSHi.

This vulnerability is associated with program files includes/SyntaxHighlight.Php.

This issue affects SyntaxHighlight_GeSHi: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Wikimedia Foundation
Product	SyntaxHighlight_GeSHi
Versions	Default: unaffected affected from * to 1.46.0, 1.45.4, 1.44.6, 1.43.9 (excl.)

References

https://phabricator.wikimedia.org/T427167

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') CWE