What’s Vulnerable › Vulnerabilities

CVE-2017-0371

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-02-18 · updated 2026-06-17

Description

MediaWiki before 1.23.16, 1.24.x through 1.27.x before 1.27.2, and 1.28.x before 1.28.1 allows remote attackers to discover the IP addresses of Wiki visitors via a style="background-image: attr(title url);" attack within a DIV element that has an attacker-controlled URL in the title attribute.

Affected products

• Wikimedia Foundation MediaWiki: before 1.23.16; from 1.24.0 before 1.27.2; from 1.28.0 before 1.28.1 — fixed in 1.23.16, 1.27.2, 1.28.1

How to fix

Upgrade to a fixed version: Wikimedia Foundation MediaWiki 1.23.16, 1.27.2, 1.28.1. Check the vendor advisory for mitigations.

References

• https://phabricator.wikimedia.org/T140591
• https://phabricator.wikimedia.org/T68404
• https://phabricator.wikimedia.org/T140591
• https://phabricator.wikimedia.org/T68404

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