CVE-2026-4846Public exploitNetwork attack vector

Page-content injection via unneutralized keyword output

Published Mar 26, 2026 · Updated Mar 26, 2026

Cross-site scripting in MuuCmf 1.9.5.20260309 allows remote attackers to alter rendered page content through the keyword parameter. The autoReply.html handler places attacker-controlled keyword input into generated web-page output without neutralizing alternate XSS syntax. No authentication is required, but a victim must interact with the affected page; published assessments bound the demonstrated consequence to low-integrity modification.

CVSS severity4.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in MuuCmf 1.9.5.20260309 allows remote attackers to alter rendered page content through the keyword parameter. The autoReply.html handler places attacker-controlled keyword input into generated web-page output without neutralizing alternate XSS syntax. No authentication is required, but a victim must interact with the affected page; published assessments bound the demonstrated consequence to low-integrity modification.

The record

CVE
CVE-2026-4846
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Beijing Huomu Technology Co., Ltd.
Product
MuuCmf
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=1.9.5.20260309

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Beijing Huomu Technology Co., Ltd. · MuuCmfversion=1.9.5.20260309

Published CVSS scores

2.1VulDBCVSS: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
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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.

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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
Privilegesunauthenticated
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')
T1059.007JavaScript

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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