What is CVE-2020-10534?

CVE-2020-10534 is a critical-severity vulnerability in MediaWiki, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2020-03-12.

How severe is CVE-2020-10534?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in MediaWiki

CVE-2020-10534

In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.

Vulnerability class: Broken Access Control

EPSS: 0.012 (65.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mediawiki
N/a — versions n/a

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-10534?: CVE-2020-10534 is a critical-severity vulnerability in MediaWiki, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2020-03-12.
How severe is CVE-2020-10534?: Critical severity. CVSS v3 base score is 9.8 out of 10.