CVE-2025-53543 Kestra allows Stored XSS before 0.22
Attackers can inject malicious scripts via error messages in the execution overview, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-53543?
CVE-2025-53543 is a medium-severity cross-site scripting vulnerability in kestra-io kestra, published on 7 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Kestra is an event-driven orchestration platform. The error message in execution "Overview" tab is vulnerable to stored XSS due to improper handling of HTTP response received. This vulnerability is fixed in 0.22.0.
Weakness: CWE-79
Which versions are affected by CVE-2025-53543?
How do I fix CVE-2025-53543?
No fix has been published for CVE-2025-53543 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-2025-53543 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53543 exists.
Sources
Also known as GHSA-qpj4-4r6r-wvf4.