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CVE-2021-46147

27
FAUCET Score

CVE-2021-46147 is a Cross-Site Request Forgery (CSRF) vulnerability affecting MediaWiki versions prior to 1.35.5, 1.36.3, and 1.37.1, specifically within the MassEditRegex extension. This high-severity vulnerability (CVSS 8.8) can be exploited remotely with low complexity, requiring user interaction, and could lead to high impacts on confidentiality, integrity, and availability. There is currently 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
< 1.35.5CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
>= 1.36.0, < 1.36.3CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
>= 1.37.0, < 1.37.1CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 is in the 43rd percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2021-46147

mediawiki: not checking for CSRF tokens

Jan 10, 2022

References

gerrit.wikimedia.org / r/q/I5980de35b0a01b5242b68b7b0bdc08adf5d968d8
Third Party Advisory
phabricator.wikimedia.org / T293341
Third Party Advisory