What is CVE-2026-15889?

CVE-2026-15889 is a medium-severity vulnerability in Arubadev Aruba Hispeed Cache, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-10.

How severe is CVE-2026-15889?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Arubadev Aruba Hispeed Cache

CVE-2026-15889

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Arubadev Aruba Hispeed Cache

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-15889?: CVE-2026-15889 is a medium-severity vulnerability in Arubadev Aruba Hispeed Cache, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-10.
How severe is CVE-2026-15889?: Medium severity. CVSS v3 base score is 6.4 out of 10.