# CVE-2026-44957: Revive Adserver improper access control in XML-RPC API

Source: https://junglewise.ai/threats/cve-2026-44957-revive-adserver-improper-access-control-in-xml-rpc-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-23. Updated: 2026-06-23  
License: CC BY 4.0 with a link back

CVE-2026-44957 · Severity: medium · CVSS 4.3 · Published 2026-06-23

Revive Adserver, a popular open-source platform for managing digital advertising, contains a security flaw in its programming interface (API). This vulnerability allows certain users to incorrectly reassign advertising entities to different parent accounts, potentially disrupting campaign management and data organization. While the risk is limited to specific configurations or in combination with other flaws, it could lead to inconsistent data and unauthorized administrative changes within the platform.

Technologies: [Revive-Adserver Adserver](https://junglewise.ai/threats/technologies/adserver). Vendors: [Revive-Adserver](https://junglewise.ai/threats/vendors/revive-adserver).

## Quick answers

**Is CVE-2026-44957 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-44957 being exploited in the wild.

**How severe is CVE-2026-44957?** Medium severity, with a CVSS score of 4.3, published 23 June 2026.

**Which products and versions are affected?** Revive-Adserver Adserver 6.0.6 and earlier.

**Is there a fix for CVE-2026-44957?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-44957 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-44957?** Check whether you run Revive-Adserver Adserver 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

A missing access control check exists in the XML-RPC API of Revive Adserver versions 6.0.6 and earlier. Specifically, various 'modify' methods fail to validate whether a user has the appropriate permissions to reassign an entity to a new parent entity. This vulnerability is categorized as Improper Access Control (CWE-284). An attacker with low-privileged API access—either through a secondary vulnerability like CVE-2026-34917 or via third-party extensions—can exploit this to create inconsistent ownership relationships. The vendor has addressed this by adding validation checks for parent entities in the affected API methods.

## Affected products

- Revive Adserver 6.0.6 and earlier

## Timeline

- 2026-06-23: disclosed
- 2026-06-23: advisory

## References

- [https://hackerone.com/reports/3677576](https://hackerone.com/reports/3677576)

## Related threats

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- [Revive Adserver stored XSS in maintenance tools](https://junglewise.ai/threats/cve-2026-50742-revive-adserver-stored-xss-in-maintenance-tools)
- [Revive Adserver code injection bypass in XML-RPC API](https://junglewise.ai/threats/cve-2026-50741-revive-adserver-code-injection-bypass-in-xml-rpc-api)