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CVE-2020-35480

Date: December 18, 2020

An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.

Language: PHP

Severity Score

Related Resources (10)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
https://security-tracker.debian.org/tracker/CVE-2020-35480
https://www.debian.org/security/2020/dsa-4816
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
https://nvd.nist.gov/vuln/detail/CVE-2020-35480
https://phabricator.wikimedia.org/T120883
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-35480
https://www.mend.io/vulnerability-database/CVE-2020-35480

Severity Score

Weakness Type (CWE)

Exposure of Sensitive Information to an Unauthorized Actor

CWE-200

Observable Discrepancy

CWE-203

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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