CVE-2024-58291Public exploitNetwork attack vector

Client-side script execution via stored forum field

Published Dec 11, 2025 · Updated Dec 11, 2025

Stored XSS in Flatboard 3.2 allows remote authenticated users to execute scripts in visitors' browsers via a forum information field. The Add Forum workflow stores the Information field and renders it without neutralizing injected HTML event handlers. Administrator access is required to save the payload; execution occurs when another user views the forum and can expose that user's session cookie.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Flatboard 3.2 allows remote authenticated users to execute scripts in visitors' browsers via a forum information field. The Add Forum workflow stores the Information field and renders it without neutralizing injected HTML event handlers. Administrator access is required to save the payload; execution occurs when another user views the forum and can expose that user's session cookie.

The record

CVE
CVE-2024-58291
Published
Dec 11, 2025
Updated
Dec 11, 2025
Vendor
Flatboard
Product
Flatboard
Classifications
CWE-79, T1539
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 11, 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=3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Flatboard · Flatboardversion=3.2

Published CVSS scores

5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

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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