# CVE-2026-50744: Revive Adserver auth bypass in XML-RPC API

Source: https://junglewise.ai/threats/cve-2026-50744-revive-adserver-auth-bypass-in-xml-rpc-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-26. Updated: 2026-06-26  
License: CC BY 4.0 with a link back

CVE-2026-50744 · Severity: medium · CVSS 4.3 · Published 2026-06-26

Revive Adserver, a popular open-source ad serving platform, contains a security flaw in its administrative programming interface (API). An attacker with low-level access could bypass restrictions intended for administrators, potentially gaining unauthorized access to sensitive configuration or operational data. This could lead to unauthorized changes in advertising campaigns or exposure of internal system information.

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

## Quick answers

**Is CVE-2026-50744 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50744 being exploited in the wild.

**How severe is CVE-2026-50744?** Medium severity, with a CVSS score of 4.3, published 26 June 2026.

**Which products and versions are affected?** Revive-Adserver Adserver 6.0.7 and earlier.

**Is there a fix for CVE-2026-50744?** 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-2026-50744 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-50744?** 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

An improper access control vulnerability exists in the XML-RPC API of Revive Adserver version 6.0.7 and earlier. The root cause is found in the 'ox.login' method, which fails to invalidate session identifiers when an authentication attempt fails or encounters an error. While the API correctly returns an error message, it simultaneously issues a valid session ID cookie in the HTTP response headers. A remote attacker with basic credentials can capture this leaked session ID to authenticate as an administrator and perform subsequent API calls without further restriction. This vulnerability is tracked as CWE-284.

## Affected products

- Revive Adserver 6.0.7 and earlier

## Timeline

- 2026-06-26: advisory: NVD publication date

## References

- [https://hackerone.com/reports/3783738](https://hackerone.com/reports/3783738)

## Related threats

- [Revive Adserver CSRF in zone-include.php](https://junglewise.ai/threats/cve-2026-50743-revive-adserver-csrf-in-zone-include-php)
- [Revive Adserver reflected XSS in stats-video.php](https://junglewise.ai/threats/cve-2026-50745-revive-adserver-reflected-xss-in-stats-video-php)
- [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)
- [Revive Adserver reflected XSS in zone-include.php](https://junglewise.ai/threats/cve-2026-50740-revive-adserver-reflected-xss-in-zone-include-php)