CVE-2019-19900

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-12-19 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in Backdrop CMS 1.13.x before 1.13.5 and 1.14.x before 1.14.2. It doesn't sufficiently filter output when displaying content type names in the content creation interface. An attacker could potentially craft a specialized content type name, then have an editor execute scripting when creating content, aka XSS. This vulnerability is mitigated by the fact that an attacker must have a role with the "Administer content types" permission.

Affected products

BackdropCMS Backdrop: from 1.13.0 before 1.13.5; from 1.14.0 before 1.14.2 — fixed in 1.13.5, 1.14.2

How to fix

Upgrade to a fixed version: BackdropCMS Backdrop 1.13.5, 1.14.2. Check the vendor advisory for mitigations.

References

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