What is the CVSS score of CVE-2025-53543?

CVE-2025-53543 has a CVSS 3.1 base score of 4.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Kestra are affected by CVE-2025-53543?

Organizations using Kestra should be aware of moderate risk from CVE-2025-53543, a cross-site scripting vulnerability rated CVSS 4.2.. A patch is available.

How to fix or mitigate CVE-2025-53543?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Kestra CVE-2025-53543

EUVD-2025-20317 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-07-07 security-advisories@github.com

XSS

4.2

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.2 MEDIUM

AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

0.22.0

EUVD ID Assigned

Mar 16, 2026 - 03:37 euvd

EUVD-2025-20317

Analysis Generated

Mar 16, 2026 - 03:37 vuln.today

CVE Published

Jul 07, 2025 - 20:15 nvd

MEDIUM 4.2

DescriptionGitHub Advisory

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.