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CVE-2016-6331

25
FAUCET Score

CVE-2016-6331 is a bypass vulnerability in MediaWiki versions before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1, specifically within the ApiParse component. This flaw allows remote attackers to circumvent per-title read restrictions by manipulating the parse action via api.php. Rated with a CVSS score of 7.5 (High), the vulnerability has a network attack vector and low attack complexity, potentially leading to high confidentiality impact without requiring user interaction. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

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

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 65th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 / T115333
PatchThird Party Advisory