# CVE-2026-34912: Revive Adserver improper access control in zone-include.php

Source: https://junglewise.ai/threats/cve-2026-34912-revive-adserver-improper-access-control-in-zone-include-php  
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-2026-34912 · Severity: medium · CVSS 4.3 · Published 2026-06-23

Revive Adserver, a popular open-source ad serving platform, contains a security flaw in how it manages permissions for linking advertisements to display areas. A user with low-level access can bypass security checks to link their own ad zones to banners or campaigns belonging to other managers on the same system. This can lead to unauthorized changes in how ads are distributed and cause data inconsistencies across different accounts on 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-2026-34912 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34912 being exploited in the wild.

**How severe is CVE-2026-34912?** 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-2026-34912?** 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-2026-34912 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-34912?** 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 (CWE-284) exists in Revive Adserver versions 6.0.6 and earlier. The flaw is located in the zone-include.php script and the corresponding API endpoints, which fail to perform adequate ownership validation when linking banners or campaigns to a zone. An authenticated attacker with low privileges can exploit this by submitting requests to link their managed zones to assets (banners/campaigns) belonging to different manager accounts on the same instance. This results in inconsistent ownership relationships and unauthorized modification of ad delivery configurations. The issue has been addressed by adding ownership validation to ensure assets can only be linked to zones managed by the same account.

## Affected products

- Revive Adserver 6.0.6 and earlier

## Timeline

- 2026-06-23: advisory: NVD publication date
- 2026-06-23: disclosed: HackerOne report published

## References

- [https://hackerone.com/reports/3650504](https://hackerone.com/reports/3650504)

## 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 auth bypass in XML-RPC API](https://junglewise.ai/threats/cve-2026-50744-revive-adserver-auth-bypass-in-xml-rpc-api)
- [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)