CVE-2025-41063Network attack vector

Authenticated reflected XSS via unvalidated debug-log input

Published Sep 4, 2025 · Updated Sep 4, 2025

Reflected XSS in appRain CMF 4.0.5 allows remote authenticated users to execute script in another user's browser via the s parameter. The /apprain/developer/debug-log/db handler reflects the s parameter into an HTML response without proper validation or output neutralization. A valid session and user interaction are required; successful exploitation exposes or modifies data accessible to the victim's browser context.

CVSS severity4.8
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in appRain CMF 4.0.5 allows remote authenticated users to execute script in another user's browser via the s parameter. The /apprain/developer/debug-log/db handler reflects the s parameter into an HTML response without proper validation or output neutralization. A valid session and user interaction are required; successful exploitation exposes or modifies data accessible to the victim's browser context.

The record

CVE
CVE-2025-41063
Published
Sep 4, 2025
Updated
Sep 4, 2025
Vendor
appRain
Product
appRain CMF
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2025Record 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=4.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

appRain · appRain CMFversion=4.0.5

Published CVSS scores

4.8INCIBECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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')
T1203Exploitation for Client Execution

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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