What is CVE-2025-65621?

CVE-2025-65621 is a medium-severity vulnerability in Snipeitapp Snipe-It, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-01.

How severe is CVE-2025-65621?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Snipeitapp Snipe-It

CVE-2025-65621

Snipe-IT before 8.3.4 allows stored XSS, allowing a low-privileged authenticated user to inject JavaScript that executes in an administrator's session, enabling privilege escalation.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-12-01 · last modified 2026-07-05.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (6.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Snipeitapp Snipe-It

Weakness classification (CWE)

References

snipeitapp.com (Product)
github.com/firef0x00/vulnerability-research/tree/main/CVE-2025-65621 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-65621?: CVE-2025-65621 is a medium-severity vulnerability in Snipeitapp Snipe-It, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-01.
How severe is CVE-2025-65621?: Medium severity. CVSS v3 base score is 5.4 out of 10.