CVE-2021-30154: debian debian_linux
Vulnerability summary
CVE-2021-30154 is a medium (CVSS 6.1) vulnerability in debian debian_linux. EPSS estimates a 1.30% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.1, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 06-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On Special:NewFiles, all the mediastatistics-header-* messages are output in HTML unescaped, leading to XSS.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
1.30%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.30% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (phabricator.wikimedia.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- mediawiki< 1:1.35.2-1
- debian_linuxEOL10.0
Fedoraproject1 product
- fedoraEOL33 | 34
Mediawiki1 product
- mediawiki< 1.31.12 | ≥ 1.32.0, < 1.35.2
Ubuntu1 product
- mediawikiAll versions (No fix recorded)
4 vendors · 5 products
