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CVE-2021-31556

CRITICALCVSS 9.8/10EPSS 1.62%

Last modified

CVE-2021-31556 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in the Oauth extension for MediaWiki through 1.35.2. MWOAuthConsumerSubmitControl.php does not ensure that the length of an RSA key will fit in a MySQL blob.. EPSS estimates a 1.62% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Oauth extension for MediaWiki through 1.35.2. MWOAuthConsumerSubmitControl.php does not ensure that the length of an RSA key will fit in a MySQL blob.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
1.62%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MediawikiMediawiki<= 1.35.2
FedoraprojectFedora33
FedoraprojectFedora34
FedoraprojectFedora35

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-31556?
An issue was discovered in the Oauth extension for MediaWiki through 1.35.2. MWOAuthConsumerSubmitControl.php does not ensure that the length of an RSA key will fit in a MySQL blob.
How severe is CVE-2021-31556?
CVE-2021-31556 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.62% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31556?
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-2021-31556?

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

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Source: NVD / NIST