# CVE-2026-82377: Apache Roller missing authorization in XML-RPC APIs

Source: https://junglewise.ai/threats/cve-2026-82377-missing-authorization-in-apache-roller-6-1-5-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-28. Updated: 2026-09-28  
License: CC BY 4.0 with a link back

CVE-2026-82377 · Severity: critical · CVSS 9.9 · Published 2026-09-28

Apache Roller, a web-based blogging platform, contains an authorization flaw in its XML-RPC Blogger and MetaWeblog APIs that allows authenticated users to read, modify, or delete weblog content belonging to other users. An attacker with valid credentials could exploit this to tamper with or destroy other users' blog entries. This only affects installations with the optional XML-RPC feature enabled, but the per-weblog API flag defaults to enabled. The vendor has released a patch that adds proper permission checks to prevent unauthorized access.

Technologies: [Apache Roller](https://junglewise.ai/threats/technologies/roller). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-82377 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82377 being exploited in the wild.

**How severe is CVE-2026-82377?** Critical severity, with a CVSS score of 9.9, published 28 September 2026.

**Which products and versions are affected?** Apache Roller 6.1.5 and earlier.

**Is there a fix for CVE-2026-82377?** A patch was published on 2026-09-05: Fix merged in Apache Roller master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-82377 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-82377?** Check whether you run Apache Roller at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Blogger and MetaWeblog XML-RPC handlers in Apache Roller authenticate API callers but fail to verify whether the caller has permission to operate on the specific weblog or entry being targeted. An authenticated user can exploit this to bypass authorization checks and perform unauthorized read, modify, or delete operations on other users' content. The vulnerability requires the global XML-RPC setting to be enabled (non-default) and affects versions prior to 6.1.6, which implements explicit per-method permission validation.

## Affected products

- Apache Roller 6.1.5 and earlier

## Timeline

- 2026-09-28: disclosed
- 2026-09-05: patched: Fix merged in Apache Roller master branch

## References

- [https://github.com/apache/roller/pull/164](https://github.com/apache/roller/pull/164)
- [https://lists.apache.org/thread/phxx56n0w6jjqzto2my3ot8hto0qjvn8](https://lists.apache.org/thread/phxx56n0w6jjqzto2my3ot8hto0qjvn8)

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