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Vulnerability record · CVE-2023-31484 · published 29 April 2023

CVE-2023-31484: Cpanpm project cpanpm improper certificate validation vulnerability

CCpanpm Project · Cpanpm

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

8.1 CVSS 3.1 High EPSS 1.5% · top 25.7% CWE-295 · Improper certificate validation
8.1CVSS 3.1 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
23References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/04/29/1 Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/05/03/3 Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/05/03/5 Mailing List
http://www.openwall.com/lists/oss-security/2023/05/07/2 Mailing List
https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/ MitigationPatchThird Party Advisory
https://github.com/andk/cpanpm/pull/175 ExploitIssue Tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKK
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAE
https://metacpan.org/dist/CPAN/changes Release Notes
https://security.netapp.com/advisory/ntap-20240621-0007/
https://www.openwall.com/lists/oss-security/2023/04/18/14 Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/04/29/1 Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/05/03/3 Mailing ListPatch
http://www.openwall.com/lists/oss-security/2023/05/03/5 Mailing List
http://www.openwall.com/lists/oss-security/2023/05/07/2 Mailing List
https://blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/ MitigationPatchThird Party Advisory
https://github.com/andk/cpanpm/pull/175 ExploitIssue Tracking
https://lists.debian.org/debian-lts-announce/2024/10/msg00017.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKK
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAE
https://metacpan.org/dist/CPAN/changes Release Notes
https://security.netapp.com/advisory/ntap-20240621-0007/
https://www.openwall.com/lists/oss-security/2023/04/18/14 Mailing ListPatch

Track CVE-2023-31484 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-31484), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.