What is CVE-2020-12480?

CVE-2020-12480 is a medium-severity vulnerability in Lightbend Play Framework, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2020-08-17.

How severe is CVE-2020-12480?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-12480 known to be exploited?

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

CSRF in Lightbend Play Framework

CVE-2020-12480

In Play Framework 2.6.0 through 2.8.1, the CSRF filter can be bypassed by making CORS simple requests with content types that contain parameters that can't be parsed.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2020-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (42.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Lightbend Play Framework

Weakness classification (CWE)

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

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.playframework.com/security/vulnerability (Vendor Advisory)
www.playframework.com/security/vulnerability/CVE-2020-12480-CsrfBlacklistBypass (Vendor Advisory)

Frequently asked questions

What is CVE-2020-12480?: CVE-2020-12480 is a medium-severity vulnerability in Lightbend Play Framework, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2020-08-17.
How severe is CVE-2020-12480?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-12480 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.