CVE-2025-23909Network attack vector

Contributor-level stored script execution

Published Jan 16, 2025 · Updated Apr 28, 2026

Stored cross-site scripting in Common Ninja Compare Ninja 2.1.0 and earlier allows remote authenticated users to inject scripts into pages. The published record and advisory do not disclose which plugin input stores the payload or where output encoding fails before rendering. Contributor-level access is required to store the payload, and execution requires another user to visit the affected content in a browser.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Common Ninja Compare Ninja 2.1.0 and earlier allows remote authenticated users to inject scripts into pages. The published record and advisory do not disclose which plugin input stores the payload or where output encoding fails before rendering. Contributor-level access is required to store the payload, and execution requires another user to visit the affected content in a browser.

The record

CVE
CVE-2025-23909
Published
Jan 16, 2025
Updated
Apr 28, 2026
Vendor
Common Ninja
Product
Compare Ninja
Classifications
CWE-79, CAPEC-592
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Common Ninja · Compare Ninjaversion=0 <=2.1.0

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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