What is CVE-2021-31555?

CVE-2021-31555 is a high-severity vulnerability in MediaWiki, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-04-22.

How severe is CVE-2021-31555?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in MediaWiki

CVE-2021-31555

An issue was discovered in the Oauth extension for MediaWiki through 1.35.2. It did not validate the oarc_version (aka oauth_registered_consumer.oarc_version) parameter's length.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.008 (52.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Mediawiki
N/a — versions n/a

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31555?: CVE-2021-31555 is a high-severity vulnerability in MediaWiki, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-04-22.
How severe is CVE-2021-31555?: High severity. CVSS v3 base score is 7.5 out of 10.