CVE-2025-4292Public exploitNetwork attack vector

Stored script execution via unencoded username

Published May 5, 2025 · Updated May 6, 2025

Stored XSS in MRCMS 3.1.3 allows remote authenticated users to execute script in another user's browser through the edit page. The /admin/user/edit.do handler stores the attacker-controlled Username value without adequate filtering or HTML entity encoding before it is rendered. Administrative access is required to submit the value, and another user must view the stored content for the script to run in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in MRCMS 3.1.3 allows remote authenticated users to execute script in another user's browser through the edit page. The /admin/user/edit.do handler stores the attacker-controlled Username value without adequate filtering or HTML entity encoding before it is rendered. Administrative access is required to submit the value, and another user must view the stored content for the script to run in that user's browser context.

The record

CVE
CVE-2025-4292
Published
May 5, 2025
Updated
May 6, 2025
Vendor
Marker
Product
MRCMS
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 5, 2025CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=3.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Marker · MRCMSversion=3.1.3

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

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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