What is CVE-2025-55123?

CVE-2025-55123 is a medium-severity vulnerability in Revive Adserver, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-20.

How severe is CVE-2025-55123?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Revive Adserver

CVE-2025-55123

Improper neutralization of input in Revive Adserver 5.5.2 and 6.0.1 and earlier versions causes manager accounts to be able to craft XSS attacks to their own advertiser users.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (35.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Revive Adserver — versions 6, 5, 6.0.2
Revive-adserver Revive_adserver — versions 6.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support@hackerone.com (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2025-55123?: CVE-2025-55123 is a medium-severity vulnerability in Revive Adserver, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-20.
How severe is CVE-2025-55123?: Medium severity. CVSS v3 base score is 5.4 out of 10.