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CVE-2016-6333

21
FAUCET Score

CVE-2016-6333 describes a cross-site scripting (XSS) vulnerability in MediaWiki versions prior to 1.23.15, 1.26.4, and 1.27.1. This flaw allows remote attackers to inject arbitrary web script or HTML through the CSS user subpage preview feature, specifically via the edit box in Special:MyPage/common.css. With a CVSS v3 score of 6.1 (Medium), exploitation requires user interaction and could lead to low confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.23.14CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
1.26.0CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.26.0:*:*:*:*:*:*:*
1.26.1CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.26.1:*:*:*:*:*:*:*
1.26.2CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.26.2:*:*:*:*:*:*:*
1.26.3CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.26.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.02%
Probability of exploitation in next 30 days
EPSS Percentile
59.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0102 is in the 72nd percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugzilla.redhat.com / show_bug.cgi
Issue Tracking
lists.wikimedia.org / pipermail/mediawiki-announce/2016-August/000195.html
Mailing ListPatchVendor Advisory
phabricator.wikimedia.org / T133147
PatchThird Party Advisory
securityfocus.com / bid/98053