What is CVE-2021-3931?

CVE-2021-3931 is a medium-severity vulnerability in Snipe Snipe/snipe-It, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2021-11-13.

How severe is CVE-2021-3931?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-3931 known to be exploited?

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

CSRF in Snipe Snipe/snipe-It

CVE-2021-3931

snipe-it is vulnerable to Cross-Site Request Forgery (CSRF)

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-11-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (36.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Snipe Snipe/snipe-It — versions unspecified
Snipeitapp Snipe-It

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

huntr.dev/bounties/03b21d69-3bf5-4b2f-a2cf-872dd677a68f (Exploit, Patch, Third Party Advisory)
github.com/snipe/snipe-it/commit/0d811d067c8e064252c0143c39d6cd4c3133679e (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3931?: CVE-2021-3931 is a medium-severity vulnerability in Snipe Snipe/snipe-It, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2021-11-13.
How severe is CVE-2021-3931?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-3931 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.