CVE-2019-19902

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% 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-20

Description

An issue was discovered in Backdrop CMS 1.13.x before 1.13.5 and 1.14.x before 1.14.2. It allows the upload of entire-site configuration archives through the user interface or command line. It does not sufficiently check uploaded archives for invalid data, allowing non-configuration scripts to potentially be uploaded to the server. This issue is mitigated by the fact that the attacker would be required to have the "Synchronize, import, and export configuration" permission, a permission that only trusted administrators should be given. Other measures in the product prevent the execution of PHP scripts, so another server-side scripting language must be accessible on the server to execute code.

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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