TI-2024-05055 Aliases CVE-2024-5439 GHSA-8m9g-pfr8-r84c

Blocksy <= 2.0.50 - Authenticated (Contributor+) Stored Cross-Site Scripting

LOW 28CWE-20Published 2024-06-05 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Blocksy theme for WordPress is vulnerable to Reflected Cross-Site Scripting via the custom_url parameter in all versions up to, and including, 2.0.50 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00288 21st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
creativethemeshq	Blocksy	up to 2.0.50	—	No fix listed	CNA

Blocksy Vendorcreativethemeshq Affected up to 2.0.50 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:creativethemes:blocksy::::::wordpress::*	before 2.0.51	Vulnerable	creativethemeshq

cpe:2.3:a:creativethemes:blocksy:*:*:*:*:*:wordpress:*:* Versions before 2.0.51 Vulnerable ·creativethemeshq

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-5439
2026-10-03 Alias added: GHSA-8m9g-pfr8-r84c

References

Patch 1

https://themes.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=229705%40blocksy%2F2.0.51&old=228990%40blocksy%2F2.0.50

Advisory 1

https://www.wordfence.com/threat-intel/vulnerabilities/id/c05687f4-5ea2-4226-982f-c3499f204685?source=cve

TI-2024-24973 WordPress Blocksy theme <= 1.9.5 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
TI-2024-20754 WordPress Blocksy theme <= 2.0.22 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1HIGH 8.8
TI-2024-21828 WordPress Blocksy theme <= 2.0.33 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
TI-2024-16385 WordPress Blocksy theme <= 2.0.19 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
TI-2024-03493 Blocksy <= 2.0.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via About Me block CVSS 3.1MEDIUM 6.4
TI-2024-10583 Blocksy <= 2.0.77 - Authenticated (Contributor+) Stored Cross-Site Scripting CVSS 3.1MEDIUM 6.4

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences