CVE-2026-4848Public exploitNetwork attack vector

Browser script execution via unescaped name parameter

Published Mar 26, 2026 · Updated Mar 26, 2026

Reflected XSS in MuuCmf 1.9.5.20260309 allows remote attackers to execute JavaScript in a user's browser via the admin extension list. The template at app/admin/view/extend/list.html places the name parameter into an input value without filtering, sanitization, or output encoding. Execution requires a user to open the crafted URL, and the script runs with the permissions of that browser session.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reflected XSS in MuuCmf 1.9.5.20260309 allows remote attackers to execute JavaScript in a user's browser via the admin extension list. The template at app/admin/view/extend/list.html places the name parameter into an input value without filtering, sanitization, or output encoding. Execution requires a user to open the crafted URL, and the script runs with the permissions of that browser session.

The record

CVE
CVE-2026-4848
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Beijing Huomu Technology Co., Ltd.
Product
MuuCmf
Classifications
CWE-94, CWE-79, T1189
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

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

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo