CVE-2025-32791 Permission policy information leakage in Backstage permission system
Attackers can leak conditional decision details from the Backstage permission backend if conditional policies are active, exposing sensitive logic.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-32791?
CVE-2025-32791 is a medium-severity vulnerability in backstage, published on 16 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Backstage Scaffolder plugin houses types and utilities for building scaffolder-related modules. A vulnerability in the Backstage permission plugin backend allows callers to extract some information about the conditional decisions returned by the permission policy installed in the permission backend. If the permission system is not in use or if the installed permission policy does not use conditional decisions, there is no impact. This issue has been patched in version 0.6.0 of the permissions backend. A workaround includes having administrators of the permission policies ensure that they are crafted in such a way that conditional decisions do not contain any sensitive information.
Weakness: CWE-213
Which versions are affected by CVE-2025-32791?
2 open source packages ship an affected version, including @backstage/plugin-permission-backend.
| Package | Affected | Fixed in |
|---|---|---|
@backstage/plugin-permission-backend npm | All versions | 0.6.0 |
@backstage/plugin-permission-backend npm | All versions | 0.6.0 |
How do I fix CVE-2025-32791?
Upgrade @backstage/plugin-permission-backend to 0.6.0 or later.
Is CVE-2025-32791 being exploited?
There is no known exploitation of CVE-2025-32791 in the wild and no public exploit code.
Sources
Also known as GHSA-f8j4-p5cr-p777.