Improper access control in Backdrop CMS

1) Improper access control

EUVDB-ID: #VU105896

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to a bug in the core Actions system. A remote attacker can use bulk actions to modify some values that they would not have permission to modify when editing individual nodes.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Backdrop CMS: 1.29.0 - 1.30.1

CPE2.3

• cpe:2.3:a:backdropcms:backdrop:1.29.4:*:*:*:*:*:*:*
• cpe:2.3:a:backdropcms:backdrop:1.30.1:*:*:*:*:*:*:*

External links

https://backdropcms.org/security/backdrop-sa-core-2025-003

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.