CVE-2026-15889 Aruba HiSpeed Cache <= 3.0.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Content
Authenticated attackers with Contributor access can inject arbitrary scripts into post content, leading to script execution for other users.
- 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-2026-15889?
CVE-2026-15889 is a medium-severity cross-site scripting vulnerability in arubadev Aruba HiSpeed Cache, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Aruba HiSpeed Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Post Content in all versions up to, and including, 3.0.14 due to insufficient input sanitization and output escaping. 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-2026-15889?
How do I fix CVE-2026-15889?
No fix has been published for CVE-2026-15889 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-2026-15889 being exploited?
There is no known exploitation of CVE-2026-15889 in the wild and no public exploit code.
Sources
Also known as GHSA-7hqr-g783-r743.