CVE-2023-6623
CriticalExploitedPublic exploitEssential Blocks <= 4.4.2 - Unauthenticated Local File Inclusion
Published Jan 16, 2024 · Updated Jun 11, 2025 · Also known as c52435f3-cc1c-4d3a-a664-a07e60fad6ae
Key Facts
Patch immediately- CVE-2023-6623 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Essential Blocks (Wpdeveloper).
- It is exploited in the wild, listed in Industry KEV feed since May 13, 2024. Public exploit code is available.
- EPSS estimates a 51% probability of exploitation in the next 30 days.
- Fixed versions are available, including Essential Blocks 4.4.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
51%
Higher than 98.9% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-6623 brief as a PDF
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Description
The Essential Blocks WordPress plugin before 4.4.3 does not prevent unauthenticated attackers from overwriting local variables when rendering templates over the REST API, which may lead to Local File Inclusion attacks.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 13, 2024 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Essential BlocksWpdeveloper | See advisory | 4.4.3 |
Patched Releases
Essential Blocks
4.4.3
Timeline
Publicly disclosed
Jan 16, 2024
Added to Industry KEV feed
May 13, 2024
Last updated
Jun 11, 2025
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-5905
- advisoryhttps://wordpress.org/documentation/article/plugins-themes-auto-updates/
- advisoryhttps://wpscan.com/vulnerability/0b094cba-9288-4c9c-87a9-bdce286fe8b6
- advisoryhttps://wpscan.com/vulnerability/74cb07fe-fc82-472f-8c52-859c176d9e51
- advisoryhttps://wpscan.com/vulnerability/7a0aaf85-8130-4fd7-8f09-f8edc929597e
FAQ
Common Questions.
The Essential Blocks WordPress plugin before 4.4.3 does not prevent unauthenticated attackers from overwriting local variables when rendering templates over the REST API, which may lead to Local File Inclusion attacks.
Affected: Essential Blocks (Wpdeveloper). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 13, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Essential Blocks 4.4.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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