CVE-2026-78289 WordPress CozyStay theme <= 1.10.0 - Cross Site Scripting (XSS) vulnerability

Q: What is CVE-2026-78289?

CVE-2026-78289 is a high-severity cross-site scripting vulnerability in LoftOcean CozyStay, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Q: Is CVE-2026-78289 being exploited?

There is no known exploitation of CVE-2026-78289 in the wild and no public exploit code.

Q: How do I fix CVE-2026-78289?

No fix has been published for CVE-2026-78289 yet. Limit exposure of the affected software until one is available.

High 7.1 Published 27 Aug 2026 Updated 27 Aug 2026

Unauthenticated attackers can inject malicious scripts into the CozyStay WordPress theme, potentially compromising user sessions or site integrity.

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-2026-78289?

CVE-2026-78289 is a high-severity cross-site scripting vulnerability in LoftOcean CozyStay, published on 27 Aug 2026. 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

Unauthenticated Cross Site Scripting (XSS) in CozyStay <= 1.10.0 versions.

Weakness: CWE-79

Which versions are affected by CVE-2026-78289?

How do I fix CVE-2026-78289?

No fix has been published for CVE-2026-78289 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-2026-78289 being exploited?