CVE-2024-3276Public exploitNetwork attack vector

Stored XSS via unsanitized CSS-class setting

Published Jun 18, 2024 · Updated Aug 1, 2024

Stored XSS in FooPlugins FooBox and FooBox Pro before 2.7.28 allows remote authenticated users to inject browser scripts via plugin settings. The Specific CSS classes setting accepts a crafted value without sanitization and is later emitted without output escaping. Administrator-level access and a site that denies unfiltered_html, such as WordPress multisite, are required; opening affected content executes the stored script in the visitor's browser.

CVSS severity4.8
Medium
EPSS probability0.34%
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 FooPlugins FooBox and FooBox Pro before 2.7.28 allows remote authenticated users to inject browser scripts via plugin settings. The Specific CSS classes setting accepts a crafted value without sanitization and is later emitted without output escaping. Administrator-level access and a site that denies unfiltered_html, such as WordPress multisite, are required; opening affected content executes the stored script in the visitor's browser.

The record

CVE
CVE-2024-3276
Published
Jun 18, 2024
Updated
Aug 1, 2024
Vendor
FooPlugins
Product
FooBox Pro
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=0 <2.7.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

FooPlugins · FooBox Proversion=0 <2.7.28
FooPlugins · FooBoxversion=0 <2.7.28

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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