What is CVE-2025-49619?

CVE-2025-49619 is a high-severity vulnerability in Skyvern, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 8.5/10. Published 2025-06-07.

How severe is CVE-2025-49619?

High severity. CVSS v3 base score is 8.5 out of 10.

Is CVE-2025-49619 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Skyvern

CVE-2025-49619

Skyvern through 0.1.85 is vulnerable to server-side template injection (SSTI) in the Prompt field of workflow blocks such as the Navigation v2 Block. Improper sanitization of Jinja2 template input allows authenticated users to inject crafted expressions that are evaluated on the server, leading to blind remote code execution (RCE).

EPSS: 0.200 (97.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Skyvern — versions 0

Weakness classification (CWE)

CWE-1336 — Improper Neutralization of Special Elements Used in a Template Engine

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-49619?: CVE-2025-49619 is a high-severity vulnerability in Skyvern, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 8.5/10. Published 2025-06-07.
How severe is CVE-2025-49619?: High severity. CVSS v3 base score is 8.5 out of 10.
Is CVE-2025-49619 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.