CVE-2021-21275Network attack vector

Forged revision reports via missing edit-token check

Published Jan 25, 2021 · Updated Aug 3, 2024

Cross-site request forgery in Kenny2github Report before f828dc6 allows remote attackers to submit revision reports through a user's session. SpecialReport.php accepted posted reason and revision values in onPost() and inserted a database record without validating a MediaWiki edit token. Exploitation requires a registered user to interact with attacker-controlled content while signed in; the consequence is an unauthorized revision report.

CVSS severity4.3
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Kenny2github Report before f828dc6 allows remote attackers to submit revision reports through a user's session. SpecialReport.php accepted posted reason and revision values in onPost() and inserted a database record without validating a MediaWiki edit token. Exploitation requires a registered user to interact with attacker-controlled content while signed in; the consequence is an unauthorized revision report.

The record

CVE
CVE-2021-21275
Published
Jan 25, 2021
Updated
Aug 3, 2024
Vendor
Kenny2github
Product
Report
Classifications
CWE-352, CAPEC-62, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< f828dc6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kenny2github · Reportversion=< f828dc6

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204User Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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