What’s Vulnerable › Vulnerabilities

CVE-2017-0366: SVG filter evasion using default attribute values in DTD declaration

• Severity: medium (CVSS 5.4 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-04-13 · updated 2026-06-17
• Weakness: CWE-20

Description

Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a flaw allowing to evade SVG filter using default attribute values in DTD declaration.

Affected products

• Debian Linux: 7.0
• Wikimedia Foundation MediaWiki: from 1.23.0 through 1.23.16; from 1.27.0 before 1.27.2; from 1.28.0 before 1.28.1 — fixed in 1.27.2, 1.28.1

How to fix

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

References

• https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-April/000207.html
• https://phabricator.wikimedia.org/T151735
• https://security-tracker.debian.org/tracker/CVE-2017-0366
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-April/000207.html
• https://phabricator.wikimedia.org/T151735
• https://security-tracker.debian.org/tracker/CVE-2017-0366

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