Is CVE-2026-50742 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-50742 being exploited in the wild.

How severe is CVE-2026-50742?

Medium severity, with a CVSS score of 4.4, published 26 June 2026.

Which products and versions are affected?

Revive-Adserver Adserver <= 6.0.7.

Is there a fix for CVE-2026-50742?

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-2026-50742 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-50742?

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.

CVE-2026-50742: Revive Adserver stored XSS in maintenance tools

Q: Is there a fix for CVE-2026-50742?

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.

Q: How is CVE-2026-50742 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-50742?

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.

CVE-2026-50742 · Severity: medium · CVSS 4.4 · Published 2026-06-26

Revive Adserver, a popular open-source ad serving platform, contains a security flaw in its maintenance tools. An attacker can inject malicious scripts that may execute when an administrator performs routine system checks. If successful, this could allow the attacker to perform unauthorized actions or steal sensitive information from the administrator's session.

Technologies: Revive-Adserver Adserver. Vendors: Revive-Adserver.

Quick answers

Is CVE-2026-50742 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-50742 being exploited in the wild.
How severe is CVE-2026-50742?: Medium severity, with a CVSS score of 4.4, published 26 June 2026.
Which products and versions are affected?: Revive-Adserver Adserver <= 6.0.7.
Is there a fix for CVE-2026-50742?: 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-2026-50742 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-50742?: 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 stored Cross-Site Scripting (XSS) vulnerability exists in Revive Adserver version 6.0.7 and earlier within the `maintenance-acl-check.php` and `maintenance-banners-check.php` components. The root cause is the failure to properly escape entity names when displaying them during inconsistency detection reports. An attacker with low privileges can inject a payload that resides in the database; however, execution is conditional on an administrator running specific maintenance tools and the system detecting an inconsistency. If triggered, the script executes in the context of the administrator's browser, potentially leading to session hijacking or unauthorized configuration changes.

Affected products

Revive Adserver <= 6.0.7

Timeline

2026-06-26: disclosed: CVE published to NVD via HackerOne report

References

https://hackerone.com/reports/3781311

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