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CVE-2025-27208

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-10-31 · updated 2026-10-07
• Weakness: CWE-79

Description

A reflected Cross-Site Scripting (XSS) vulnerability has been identified in Revive Adserver version 5.5.2. An attacker could trick a user with access to the user interface of a Revive Adserver instance into clicking on a specifically crafted URL and execute injected JavaScript code in the context of the victim's browser. The session cookie cannot be accessed, but a number of other operations could be performed. The vulnerability is present in the admin-search.php file and can be exploited via the compact parameter.

Affected products

• Revive Adserver: before 6.0.0; 6.0.0-rc1 — fixed in 6.0.0

How to fix

Upgrade to a fixed version: Revive Adserver 6.0.0. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/3091390
• http://seclists.org/fulldisclosure/2025/Oct/20

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