What is CVE-2023-37303?

CVE-2023-37303 is a critical-severity vulnerability in Mediawiki, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 9.8/10. Published 2023-06-30.

How severe is CVE-2023-37303?

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

Vulnerability in Mediawiki

CVE-2023-37303

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In certain situations, an attempt to block a user fails after a temporary browser hang and a DBQueryDisconnectedError error message.

EPSS: 0.008 (51.9th 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-754 — Improper Check for Unusual or Exceptional Conditions

References

cve@mitre.org (Exploit, Patch, Issue Tracking, Vendor Advisory)
cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2023-37303?: CVE-2023-37303 is a critical-severity vulnerability in Mediawiki, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 9.8/10. Published 2023-06-30.
How severe is CVE-2023-37303?: Critical severity. CVSS v3 base score is 9.8 out of 10.