CVE-2024-5439: The Blocksy theme for WordPress is vulnerable to Reflected Cross-Site Scripting via the custom_url parameter i

Q: How do I fix CVE-2024-5439?

blocksy: upgrade to 2.0.51. Exact commands for each OS are on this page.

Q: Is CVE-2024-5439 being exploited?

CVE-2024-5439 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-5439 affect?

CVE-2024-5439 affects blocksy. Severity is medium (CVSS 6.4). 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

Q: How urgent is CVE-2024-5439?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.4UPGRADE

CVE-2024-5439 is a medium-severity flaw (CVSS 6.4) affecting blocksy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-20, CWE-79
Published	2024-06-05
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: creativethemes

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-06-05 08:15 UTCPublished CVE record published
2026-06-17 08:15 UTCUpdated Record last modified

creativethemes blocksy UPGRADE

Affected: < 2.0.51

Fixed in: 2.0.51

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy blocksy || rpm -q blocksy || blocksy --version

2. UPGRADE to 2.0.51 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade blocksy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade blocksy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-5439?

blocksy: upgrade to 2.0.51. Exact commands for each OS are on this page.

Is CVE-2024-5439 being exploited?

CVE-2024-5439 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-5439 affect?

CVE-2024-5439 affects blocksy. Severity is medium (CVSS 6.4). 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

How urgent is CVE-2024-5439?

Priority 28/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2024-4943 MEDIUM 6.4 UPGRADE The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘has_field_link_rel’ para
CVE-2024-4158 MEDIUM 6.4 UPGRADE The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in ve
CVE-2024-3747 MEDIUM 6.4 UPGRADE The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the className parameter in th
CVE-2024-37469 MEDIUM 5.4 UPGRADE Cross-Site Request Forgery (CSRF) vulnerability in creativethemeshq Blocksy blocksy allows Cross Site Request
CVE-2024-31382 MEDIUM 4.3 UPGRADE Cross-Site Request Forgery (CSRF) vulnerability in creativethemeshq Blocksy blocksy.This issue affects Blocksy

References

← Back to latest CVEs