CVE-2020-16156

CPAN 2.28 allows Signature Verification Bypass.

CVSS v3.1 NVD

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

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

0.86% chance of exploitation in the next 30 days, 58th percentile

Published

2021-12-13

Updated

2025-11-03

Proof-of-concept exploits (1)

• https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/

Security advisories

• http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-chec…
• https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities
• https://metacpan.org/pod/distribution/CPAN/scripts/cpan

References

• CVE Record
• NVD entry