Low severity · published Sep 30, 2026
CVE-2026-103443
API permits session-seeded javascript URL XSS
1.1
CVSS
0.2%
EPSS
No
On KEV
Description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Collection (Book) extension allows XSS Targeting Non-Script Elements.
This issue affects MediaWiki Collection (Book) extension: 1.46, 1.45, and 1.43.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaWiki Collection (Book) extension · The Wikimedia Foundation
1.46; 1.45; 1.43 · source: vendor
Affected product
MC
MediaWiki Collection (Book) extension
The Wikimedia Foundation