Reported vulnerability

Greenshift <= 12.8.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via disablelazy Attribute

Q: Which versions of Greenshift – animation and page builder blocks are affected?

Wordfence lists these affected versions: Start version unspecified, through 12.8.9. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for Greenshift – animation and page builder blocks?

Wordfence reports a fix for this issue in Greenshift – animation and page builder blocks. It lists these fixed versions: 12.9.0. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 10 Apr 2026

Updated 11 Apr 2026

CVE-2026-4895

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 6.4

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.

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

Greenshift – animation and page builder blocks

Software: plugin · greenshift-animation-and-page-builder-blocks
Affected versions: Start version unspecified, through 12.8.9
Fix availability: Fix available
Fixed versions: 12.9.0

Recommended action

Update to version 12.9.0, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/6e3ae3c6-a7d1-46f0-a006-996c1fbe7c7e?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of Greenshift – animation and page builder blocks are affected?

Wordfence lists these affected versions: Start version unspecified, through 12.8.9. Use the version checker above to compare your installed release with this report.

Is a fix available for Greenshift – animation and page builder blocks?

Wordfence reports a fix for this issue in Greenshift – animation and page builder blocks. It lists these fixed versions: 12.9.0. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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