CVE-2024-8239Public exploitNetwork attack vector

Stored XSS via unescaped Twitter profile URL

Published Sep 30, 2024 · Updated Oct 1, 2024

Stored XSS in Squirrly Limited Starbox before 3.5.3 allows remote authenticated users to run scripts via a crafted Twitter URL. The plugin inserts the saved Twitter profile value into an HTML link attribute without sufficient sanitization or output escaping, so a quote can end the attribute and add an event handler. Contributor-level access is required to save the payload, and execution occurs when another user views the attacker's profile, a recent-post preview, or a page using the Starbox shortcode.

CVSS severity5.4
Medium
EPSS probability0.38%
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 Squirrly Limited Starbox before 3.5.3 allows remote authenticated users to run scripts via a crafted Twitter URL. The plugin inserts the saved Twitter profile value into an HTML link attribute without sufficient sanitization or output escaping, so a quote can end the attribute and add an event handler. Contributor-level access is required to save the payload, and execution occurs when another user views the attacker's profile, a recent-post preview, or a page using the Starbox shortcode.

The record

CVE
CVE-2024-8239
Published
Sep 30, 2024
Updated
Oct 1, 2024
Vendor
Squirrly Limited
Product
Starbox – the Author Box for Humans
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=0 <3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Squirrly Limited · Starbox – the Author Box for Humansversion=0 <3.5.3

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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