CVE-2025-5528 Cross-site scripting in Social Sharing Plugin – Sassy Social Share

Medium 6.1 Published 7 Jun 2025 Updated 8 Apr 2026

Unauthenticated attackers can inject arbitrary web scripts via the heateor_mastodon_share parameter, executing code in victim browsers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-5528?

CVE-2025-5528 is a medium-severity cross-site scripting vulnerability in heateor Social Sharing Plugin – Sassy Social Share, published on 7 Jun 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The Social Sharing Plugin – Sassy Social Share plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the heateor_mastodon_share parameter in all versions up to, and including, 3.3.75 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action, such as clicking on a link.

Weakness: CWE-79

Which versions are affected by CVE-2025-5528?

It affects 1 product.

Products include Heateor Sassy Social Share.

How do I fix CVE-2025-5528?

No fix has been published for CVE-2025-5528 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-5528 being exploited?

There is no known exploitation of CVE-2025-5528 in the wild and no public exploit code.

Sources

Also known as GHSA-x3mm-qc6h-xw5v.