CVE-2025-2582Public exploitNetwork attack vector

Stored XSS via unsanitized attachment notice

Published Mar 21, 2025 · Updated Apr 21, 2025

Stored cross-site scripting in SimpleMachines SMF 2.1.4 allows remote authenticated users to inject script through the Notice parameter. The ManageAttachments.php attachment-removal path accepts Notice in by-age and by-size POST requests and later renders it in a post without neutralization. Administrative access, attachment deletion, and a victim viewing the affected post are required; Simple Machines disputes that this behavior is a security flaw.

CVSS severity5.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in SimpleMachines SMF 2.1.4 allows remote authenticated users to inject script through the Notice parameter. The ManageAttachments.php attachment-removal path accepts Notice in by-age and by-size POST requests and later renders it in a post without neutralization. Administrative access, attachment deletion, and a victim viewing the affected post are required; Simple Machines disputes that this behavior is a security flaw.

The record

CVE
CVE-2025-2582
Published
Mar 21, 2025
Updated
Apr 21, 2025
Vendor
free5GC
Product
SMF
Classifications
CWE-94, CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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=2.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

free5GC · SMFversion=2.1.4

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
5.4NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
5.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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