CVE-2024-4158: The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in ve

Q: How do I fix CVE-2024-4158?

blocksy: upgrade to 2.0.43. Exact commands for each OS are on this page.

Q: Is CVE-2024-4158 being exploited?

CVE-2024-4158 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-2024-4158 affect?

CVE-2024-4158 affects blocksy. Severity is medium (CVSS 6.4). The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in versions up to, and including, 2.0.42 due to insufficient input sanitization and output escaping. This makes it possible for authent

Q: How urgent is CVE-2024-4158?

Priority 29/100. No elevated risk signals yet.

Routine

MEDIUM 6.4UPGRADE

CVE-2024-4158 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 Stored Cross-Site Scripting via the ‘tagName’ parameter in versions up to, and including, 2.0.42 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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 73%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-05-14
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

2024-05-14 15:43 UTCPublished CVE record published
2026-06-17 08:01 UTCUpdated Record last modified

creativethemes blocksy UPGRADE

Affected: < 2.0.43

Fixed in: 2.0.43

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.0.43 (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-2024-4158?

blocksy: upgrade to 2.0.43. Exact commands for each OS are on this page.

Is CVE-2024-4158 being exploited?

CVE-2024-4158 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-2024-4158 affect?

CVE-2024-4158 affects blocksy. Severity is medium (CVSS 6.4). The Blocksy theme for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘tagName’ parameter in versions up to, and including, 2.0.42 due to insufficient input sanitization and output escaping. This makes it possible for authent

How urgent is CVE-2024-4158?

Priority 29/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

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References

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