CVE-2021-46148

Name: CVE-2021-46148
Creator: NVD / NIST
Published: 2022-01-10T14:11:28.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2021-46148 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Some unprivileged users can view confidential information (e.g., IP addresses and User-Agent headers for election traffic) on a testwiki SecurePoll instance.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Some unprivileged users can view confidential information (e.g., IP addresses and User-Agent headers for election traffic) on a testwiki SecurePoll instance.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.18%

63.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	< 1.35.5
Mediawiki	Mediawiki	>= 1.36.0, < 1.36.3
Mediawiki	Mediawiki	>= 1.37.0, < 1.37.1

References

https://gerrit.wikimedia.org/r/q/Ib2715adb281f8892b586dcb1895e87ac0eb548b0Third Party Advisory
https://phabricator.wikimedia.org/T290808Third Party Advisory
https://phabricator.wikimedia.org/T290856Third Party Advisory
https://gerrit.wikimedia.org/r/q/Ib2715adb281f8892b586dcb1895e87ac0eb548b0Third Party Advisory
https://phabricator.wikimedia.org/T290808Third Party Advisory
https://phabricator.wikimedia.org/T290856Third Party Advisory

Timeline

Published: Jan 10, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46148?

How severe is CVE-2021-46148?

CVE-2021-46148 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46148?

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-2021-46148?

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

Scan your code now

Source: NVD / NIST