CVE-2017-0366

SVG filter evasion using default attribute values in DTD declaration

5.4 MediumFix available

CVE-2017-0366 is a medium vulnerability (CVSS 5.4) in Mediawiki, published April 16, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.30%, the 70th percentile. Fixed in mediawiki 1:1.27.2-1.

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.30%Up 0.5 points since Apr 14, 2021

What each source reports

NVD Score used 5.4

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.

Record: CVE-2017-0366
CVSS 3.0: 5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:N/I:P/A:N
Weakness: CWE-20
Updated: 2026-11-02

CVE List No score

SVG filter evasion using default attribute values in DTD declaration

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.

Record: CVE-2017-0366
Updated: 2026-11-02

EUVDEUVD-2017-0720 No score

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.

Record: EUVD-2017-0720
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3cfx-qf53-8h6m 5.4

Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a flaw allowing to evade SVG filter using...

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.

Record: GHSA-3cfx-qf53-8h6m
CVSS 3.0: 5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-20
Updated: 2026-11-02

OSV 5.4

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.

Record: CVE-2017-0366
CVSS 3.0: 5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2017-0366 5.4

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.

Record: DEBIAN-CVE-2017-0366
CVSS 3.0: 5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2017-0366 5.4

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.

Record: UBUNTU-CVE-2017-0366
CVSS 3.0: 5.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSVMGASA-2017-0110 No score

Updated mediawiki packages fix security vulnerability

API parameters may now be marked as "sensitive" to keep their values out of the logs (CVE-2017-0361).

"Mark all pages visited" on the watchlist now requires a CSRF token (CVE-2017-0362).

Special:UserLogin and Special:Search allow redirect to interwiki links (CVE-2017-0363, CVE-2017-0364).

XSS in SearchHighlighter::highlightText() when $wgAdvancedSearchHighlighting is true (CVE-2017-0365).

SVG filter evasion using default attribute values in DTD declaration (CVE-2017-0366).

Escape content model/format url parameter in message (CVE-2017-0368).

Sysops can undelete pages, although the page is protected against it (CVE-2017-0369).

Spam blacklist ineffective on encoded URLs inside file inclusion syntax's link parameter (CVE-2017-0370).

Record: MGASA-2017-0110
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Debian:12	before 1:1.27.2-1	1:1.27.2-1
`mediawiki` Debian:13	before 1:1.27.2-1	1:1.27.2-1
`mediawiki` Debian:14	before 1:1.27.2-1	1:1.27.2-1
`mediawiki` Mageia:5	before 1.23.16-1.mga5	1.23.16-1.mga5

History

History
When	Changed	Sources
2026-11-03	affected
2026-11-03	aliases, products	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References