CVE-2026-3617 Cross-site scripting in Paypal Shortcodes
Authenticated attackers can inject arbitrary scripts via shortcode attributes, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3617?
CVE-2026-3617 is a medium-severity cross-site scripting vulnerability in swergroup Paypal Shortcodes, published on 21 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Paypal Shortcode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'amount' and 'name' shortcode attributes in all versions up to, and including, 0.3. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The swer_paypal_shortcode() function extracts shortcode attributes using extract() and shortcode_atts() at line 89, then directly concatenates the $name and $amount values into HTML input element value attributes at lines 105-106 without applying esc_attr() or any other escaping function. 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-3617?
How do I fix CVE-2026-3617?
No fix has been published for CVE-2026-3617 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-2026-3617 being exploited?
There is no known exploitation of CVE-2026-3617 in the wild and no public exploit code.
Sources
Also known as GHSA-p79j-x7g4-4j32.