What is CVE-2025-53543?

CVE-2025-53543 is a medium-severity vulnerability in Kestra-io Kestra, classified under Cross-site Scripting. CVSS score: 4.2/10. Published 2025-07-07.

How severe is CVE-2025-53543?

Medium severity. CVSS v3 base score is 4.2 out of 10.

XSS in Kestra-io Kestra

CVE-2025-53543

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (26.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N.

Affected products

Kestra-io Kestra — versions < 0.22.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/kestra-io/kestra/security/advisories/GHSA-qpj4-4r6r-wvf4 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2025-53543?: CVE-2025-53543 is a medium-severity vulnerability in Kestra-io Kestra, classified under Cross-site Scripting. CVSS score: 4.2/10. Published 2025-07-07.
How severe is CVE-2025-53543?: Medium severity. CVSS v3 base score is 4.2 out of 10.