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CVE-2016-6337

25
FAUCET Score

CVE-2016-6337 is a high-severity vulnerability affecting MediaWiki 1.27.x before 1.27.1, allowing remote attackers to bypass session access restrictions. This flaw arises from an improper call to UserGetRights after Session::getAllowedUserRights, potentially leading to unauthorized actions. With a CVSS score of 7.5, it poses a significant integrity risk (I:H) and requires no user interaction or prior authentication. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.27.0CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.27.0:*:*:*:*:*:*:*

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:N/I:H/A:N

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

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 45th percentile among its peer group of 51,485 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

lists.wikimedia.org / pipermail/mediawiki-announce/2016-August/000195.html
Mailing ListPatchVendor Advisory
phabricator.wikimedia.org / T139670
PatchThird Party Advisory