Backdrop CMS before 1.35.1 contains an information disclosure vulnerability that allows unauthenticated attackers to retrieve configuration export archives left on the server after transfer. Attackers can download compressed archives generated by users with configuration export permission to obtain the full site configuration, including sensitive settings.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://backdropcms.org/security/backdrop-sa-core-2026-006
disclosure@vulncheck.com
https://github.com/backdrop/backdrop
disclosure@vulncheck.com
https://github.com/backdrop/backdrop/commit/1ae67061d9d487bb6cb3b8611191354052f…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/backdrop-cms-before-1.35.1-information-dis…
disclosure@vulncheck.com