CVE-2026-4082 ER Swiffy Insert <= 1.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Authenticated attackers can inject arbitrary scripts via shortcode attributes in the ER Swiffy Insert WordPress plugin, leading to stored XSS.
- 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-2026-4082?
CVE-2026-4082 is a medium-severity cross-site scripting vulnerability in erithq ER Swiffy Insert, published on 22 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The ER Swiffy Insert plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [swiffy] shortcode in all versions up to and including 1.0.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes ('n', 'w', 'h'). These attributes are extracted using extract() and directly interpolated into the HTML output without any escaping such as esc_attr(). 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-2026-4082?
How do I fix CVE-2026-4082?
No fix has been published for CVE-2026-4082 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-2026-4082 being exploited?
There is no known exploitation of CVE-2026-4082 in the wild and no public exploit code.
Sources
Also known as GHSA-f7h9-vgfr-v594.