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CVE-2026-21663

MEDIUM
6.1
CVSS Score
Published: January 20, 2026 at 08:48 PM UTC
Updated: June 17, 2026 at 10:18 AM UTC
2 products affected across 2 vendorsRevive AdserverRevive Adserver

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

HackerOne community member Patrick Lang (7yr) has reported a reflected XSS vulnerability in the banner-acl.php 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Revive Adserver· Aquaplatform
95%
6.0.0 ≤ v ≤ 6.0.4
Revive Adserver· Revive Adserver
60%
6 ≤ v ≤ 6.0.46

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Third Party Advisory
Source: cverecord
https://hackerone.com/reports/3473696

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMhackerone
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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