Kestra allows Stored XSS before 0.22

published 2025-07-07 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-20317

cvss: 4.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

kestra kestra 0.22.0

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 16 mo ago (2025-07-07)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.2	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Affected products

kestra-io kestra

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /kestra-io/kestra/security/advisories/GHSA-qpj4-4r6r-wvf4

Sources

CVE List CVE-2025-53543
NVD CVE-2025-53543

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary