CVE-2019-18987

Name: CVE-2019-18987
Creator: NVD / NIST
Published: 2019-11-15T06:15:10.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.11%

Last modified Jun 17, 2026

CVE-2019-18987 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in the AbuseFilter extension through 1.34 for MediaWiki. Once a specific abuse filter has (accidentally or otherwise) been made public, its previous versions can be exposed, thus potentially disclosing private or sensitive information within the filter's definition.. EPSS estimates a 1.11% chance of exploitation in the next 30 days.

Description

An issue was discovered in the AbuseFilter extension through 1.34 for MediaWiki. Once a specific abuse filter has (accidentally or otherwise) been made public, its previous versions can be exposed, thus potentially disclosing private or sensitive information within the filter's definition.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.11%

61.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Mediawiki	Abusefilter	<= 1.34

References

https://gerrit.wikimedia.org/r/q/Ic12790bd33982473f77551bde9599ed083a3e1f1Patch, Third Party Advisory
https://phabricator.wikimedia.org/T237887Issue Tracking, Patch, Third Party Advisory
https://www.mediawiki.org/wiki/Extension:AbuseFilterProduct, Vendor Advisory
https://gerrit.wikimedia.org/r/q/Ic12790bd33982473f77551bde9599ed083a3e1f1Patch, Third Party Advisory
https://phabricator.wikimedia.org/T237887Issue Tracking, Patch, Third Party Advisory
https://www.mediawiki.org/wiki/Extension:AbuseFilterProduct, Vendor Advisory

Timeline

Published: Nov 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18987?

How severe is CVE-2019-18987?

CVE-2019-18987 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.11% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18987?

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-2019-18987?

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

Scan your code now

Source: NVD / NIST