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CVE-2021-35197

HIGHCVSS 7.5/10EPSS 1.94%

Last modified

CVE-2021-35197 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).. EPSS estimates a 1.94% chance of exploitation in the next 30 days.

Description

In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.94%

77.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MediawikiMediawiki< 1.31.15
MediawikiMediawiki>= 1.32.0, < 1.35.3
MediawikiMediawiki>= 1.36.0, < 1.36.1
DebianDebian Linux9.0
DebianDebian Linux10.0
DebianDebian Linux11.0
FedoraprojectFedora33
FedoraprojectFedora34
FedoraprojectFedora35

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-35197?
In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).
How severe is CVE-2021-35197?
CVE-2021-35197 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.94% probability of exploitation in the next 30 days.
How do I fix CVE-2021-35197?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-35197?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST