CVE-2021-24177Public exploitNetwork attack vector

Administrator browser script execution via User-Agent reflection

Published Apr 5, 2021 · Updated Aug 3, 2024

Reflected XSS in mndpsingh287 File Manager before 7.1 allows remote authenticated users to execute script in an administrator's browser. The System Properties page reflects the User-Agent header into its HTML response without neutralizing script markup. The plugin must be active, and a logged-in administrator must be induced to request the administrator-only page; execution remains in that browser context.

CVSS severity5.4
Medium
EPSS probability0.90%
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 mndpsingh287 File Manager before 7.1 allows remote authenticated users to execute script in an administrator's browser. The System Properties page reflects the User-Agent header into its HTML response without neutralizing script markup. The plugin must be active, and a logged-in administrator must be induced to request the administrator-only page; execution remains in that browser context.

The record

CVE
CVE-2021-24177
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
mndpsingh287
Product
File Manager
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=7.1 <7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

mndpsingh287 · File Managerversion=7.1 <7.1

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/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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