CVE-2013-5123

5.9 MEDIUM 8% exploit odds Fix listed Auth & access Library

What it is

The mirroring support (-M, --use-mirrors) in Python Pip before 1.5 uses insecure DNS querying and authenticity checks which allows attackers to perform man-in-the-middle attacks.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data tampering.
Exploit odds: 8.0% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2019-11-05 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:58 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 8.0% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2019-11-05 22:15 UTC
Last modified: 2026-06-16 23:58 UTC
Exploit probability: 8.0% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

Pypa Pip < 1.5
Virtualenv 12.0.7
Fedoraproject Fedora 20
Fedoraproject Fedora 21
Redhat Openshift 1.0
Redhat Openshift 2.0
Redhat Software Collections
Debian Linux 8.0

Attack profile CVSS 3.1 · 5.9

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-5123.md and follow it. Check whether this project is affected by CVE-2013-5123. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record