What is the CVSS score of CVE-2025-55123?

CVE-2025-55123 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Revive Adserver are affected by CVE-2025-55123?

Organizations using Revive Adserver 5.5.2 and 6.0.1 and earlier should be aware of moderate risk from CVE-2025-55123, a cross-site scripting vulnerability rated CVSS 5.4.

Is there a public PoC exploit available for CVE-2025-55123?

Yes, a public proof-of-concept exploit is available for CVE-2025-55123. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-55123?

Within 30 days: Identify affected systems running Revive Adserver 5.5.2 and 6.0.1 and earlier and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Revive Adserver CVE-2025-55123

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-11-20 support@hackerone.com

XSS Revive Adserver

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:23 vuln.today

PoC Detected

Dec 05, 2025 - 20:17 vuln.today

Public exploit code

CVE Published

Nov 20, 2025 - 20:16 nvd

MEDIUM 5.4

DescriptionCVE.org

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.

AnalysisAI

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. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Revive-Adserver Revive Adserver.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-55123 vulnerability details – vuln.today

Back