CVE-2026-103584: the wikimedia foundation mediawiki commonsmetadata extension
CVSS: 1.1v4.0LowAwaiting analysis
Published 30-09-2026Last modified 01-10-2026
Vulnerability summary
CVE-2026-103584 is a low (CVSS 1.1) vulnerability in the wikimedia foundation mediawiki commonsmetadata extension. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 19.8% of scored vulnerabilities.
CVSS score
1.1/10
010
Low · v4.0 (CVE.org)EPSS score
0.29%
0%100%
Low · Change unavailableKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 30-09-2026PublishedVulnerability first disclosed.
- 01-10-2026Last modifiedVulnerability information updated.
Description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.
CVSS metrics
2 scores · 2 sources · 1 versionLow 1.1Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:AmberSourcesAll 2 agree
- NVDNIST1.1LowCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Amber
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
20%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
02-10-202622-10-2026
EPSS score0.29%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
The wikimedia foundation1 product
- mediawiki commonsmetadata extension1.46 | 1.45 | 1.43
1 vendor · 1 product