CVE-2026-21664

MEDIUM
2026-01-20 [email protected]
6.1
CVSS 3.0
Share

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 20, 2026 - 21:16 nvd
MEDIUM 6.1

Tags

PHP XSS Revive Adserver

Description

HackerOne community member Huynh Pham Thanh Luc (nigh7c0r3) has reported a reflected XSS vulnerability in the afr.php delivery script of Revive Adserver. An attacker can craft a specific URL that includes an HTML payload in a parameter. If a logged in administrator visits the URL, the HTML is sent to the browser and malicious scripts would be executed.

Analysis

Revive Adserver's afr.php script contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts through crafted URLs targeting logged-in administrators. An attacker can exploit this to execute arbitrary JavaScript in an admin's browser session, potentially leading to unauthorized actions or credential theft. …

Sign in for full analysis, threat intelligence, and remediation guidance.

Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Sign in for detailed remediation steps.

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Sign in - Free

Priority Score

31
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: 0

Share

CVE-2026-21664 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy