Is CVE-2026-4895 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-4895, but active exploitation has not been confirmed.

Can CVE-2026-4895 be exploited remotely?

Yes. CVE-2026-4895 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4895?

CVE-2026-4895 has a CVSS score of 6.4 (MEDIUM).

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MEDIUMPOC

CVE-2026-4895

CWE-79Published: April 11, 2026· Updated: Apr 13, 2026

6.4

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2026-4895 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2026-4895. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.