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Fencer Intel
medium 5.4

CVE-2017-0366 json

SVG filter evasion using default attribute values in DTD declaration

published 2018-04-13 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-0720

cvss
5.4
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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.

Patch / fix

  • mediawiki mediawiki 1.27.2, 1.28.1
  • mediawiki Debian 14, Debian 13, Debian 12 1:1.27.2-1

debian advisories DEBIAN-CVE-2017-0366

  • mediawiki Arch Linux 1.28.1-1

arch linux advisories AVG-236

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-0366 updated cvss 4.3

mediawiki: SVG filter evasion using default attribute values in DTD declaration

  • Red Hat OpenShift Enterprise 3 mediawiki123
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N

Affected products

  • mediawiki mediawiki

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.