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CVE-2024-5595· NVD / CVE Program· CNA WPScan

Essential Blocks < 4.7.0 - Contributor+ Stored XSS

The Essential Blocks WordPress plugin before 4.7.0 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

MediumCVSS 5.4 · v3.1—No exploit Fix available
Published
Aug 2, 2024
Updated
Jun 17, 2026
EPSS
0.4% · 36th percentile
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JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Affected systems

VendorProduct
wpdeveloperessential blocks

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • wpdeveloper essential blocksbefore 4.7.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (WPScan). Independent of NVD's CPE analysis and usually ahead of it.

  • Unknown Essential Blocks

    • before 4.7.0affected · semver

Same product

wpdeveloper: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-6623Essential Blocks < 4.4.3 - Unauthenticated Local File Inclusion
    54Plan
  • CVE-2023-4402Essential Blocks <= 4.2.0 - Unauthenticated PHP Object Injection via products
    39Monitor
  • CVE-2025-26871WordPress Essential Blocks plugin <= 4.8.3 - Broken Access Control vulnerability
    35Monitor
  • CVE-2023-51360WordPress Essential Blocks plugin <= 4.2.0 - Multiple Subscriber+ Broken Access Control vulnerability
    35Monitor
  • CVE-2023-51359WordPress Essential Blocks plugin <= 4.2.0 - Multiple Contributor+ Broken Access Control vulnerability
    35Monitor
  • CVE-2023-47760WordPress Essential Blocks plugin <= 4.2.0 - Broken Access Control vulnerability
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Unknown Essential Blocks4.7.0Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-4738564 days apartWordPress Essential Blocks plugin <= 4.8.4 - Cross Site Scripting (XSS) vulnerability
    21Monitor
  • CVE-2024-489176 days apartEssential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.12 - Authenticated (Contributor+) Stored Cross-Site Scripting
    21Monitor
  • CVE-2024-3818106 days apartEssential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.9 - Authenticated (Contributor+) DOM-Based Cross-Site Scripting via "Social Icons"
    21Monitor
  • CVE-2024-31306117 days apartWordPress Essential Blocks plugin <= 4.5.3 - Cross Site Scripting (XSS) vulnerability
    21Monitor
  • CVE-2024-2255135 days apartEssential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting
    21Monitor
  • CVE-2023-7071204 days apartEssential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.4.6 - Authenticated (Contributor+) Stored Cross-Site Scripting
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

nvd-secondary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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