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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-4895 Detail

Description

The GreenShift - Animation and Page Builder Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 12.8.9 This is due to insufficient input sanitization and output escaping in the gspb_greenShift_block_script_assets() function. The function uses str_replace() to insert 'fetchpriority="high"' before 'src=' attributes when processing greenshift-blocks/image blocks with the disablelazy attribute enabled. Because this replacement operates on the entire HTML string without parsing, contributors can inject the string 'src=' into HTML attribute values (such as class attributes). When the str_replace executes, the double quotes in the replacement string break out of the attribute context, allowing injection of malicious HTML attributes like onfocus with JavaScript payloads. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.8.6/init.php#L866 Wordfence
https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/tags/12.8.6/init.php#L889 Wordfence
https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/init.php#L866 Wordfence
https://plugins.trac.wordpress.org/browser/greenshift-animation-and-page-builder-blocks/trunk/init.php#L889 Wordfence
https://plugins.trac.wordpress.org/changeset/3494855/greenshift-animation-and-page-builder-blocks/trunk/init.php Wordfence
https://plugins.trac.wordpress.org/changeset?old_path=%2Fgreenshift-animation-and-page-builder-blocks/tags/12.8.9&new_path=%2Fgreenshift-animation-and-page-builder-blocks/tags/12.9.0 Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/6e3ae3c6-a7d1-46f0-a006-996c1fbe7c7e?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Wordfence  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4895
NVD Published Date:
04/10/2026
NVD Last Modified:
04/10/2026
Source:
Wordfence