CVE-2021-31556
Critical
Published: 12 August 2021
Published
12 August 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0066
71.5th percentile
Risk Priority
20
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-31556 is a critical-severity Improper Validation of Specified Quantity in Input (CWE-1284) vulnerability in Fedoraproject Fedora. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 28.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-18453
Vulnerability details
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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mediawiki
mediawiki
≤ 1.35.2
fedoraproject
fedora
33, 34, 35
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.