CVE-2023-31484

Name: CVE-2023-31484
Creator: NVD / NIST
Published: 2023-04-29T00:15:09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.56%

Last modified Jun 17, 2026

CVE-2023-31484 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.. EPSS estimates a 1.56% chance of exploitation in the next 30 days.

Description

CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.56%

72.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cpanpm Project	Cpanpm	< 2.35
Perl	Perl	< 5.38.0

References

http://www.openwall.com/lists/oss-security/2023/04/29/1Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/05/03/3Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/05/03/5Mailing List
http://www.openwall.com/lists/oss-security/2023/05/07/2Mailing List
https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/Mitigation, Patch, Third Party Advisory
https://github.com/andk/cpanpm/pull/175Exploit, Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB/
https://metacpan.org/dist/CPAN/changesRelease Notes
https://security.netapp.com/advisory/ntap-20240621-0007/
https://www.openwall.com/lists/oss-security/2023/04/18/14Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/04/29/1Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/05/03/3Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/05/03/5Mailing List
http://www.openwall.com/lists/oss-security/2023/05/07/2Mailing List
https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/Mitigation, Patch, Third Party Advisory
https://github.com/andk/cpanpm/pull/175Exploit, Issue Tracking
https://lists.debian.org/debian-lts-announce/2024/10/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB/
https://metacpan.org/dist/CPAN/changesRelease Notes
https://security.netapp.com/advisory/ntap-20240621-0007/
https://www.openwall.com/lists/oss-security/2023/04/18/14Mailing List, Patch

Timeline

Published: Apr 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31484?

CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.

How severe is CVE-2023-31484?

CVE-2023-31484 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.56% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31484?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-31484?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST