CVE-2013-5123

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 8.0%, top 6% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekWeaponized
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 8%CVSS: 5.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.9
EG Score
5.9(medium)
EPSS
94.2%
KEV
Not listed

Published

November 5, 2019

Last Modified

November 21, 2024

References (16)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pip0.2 ... 1.4.1 (28 versions)1.5—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 21:52 UTCEG score recompute
  2. 2026-07-22 14:04 UTCEPSS rescore
  3. 2026-07-21 15:21 UTCEPSS rescore
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  7. 2026-07-20 02:46 UTCOSV refresh
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  25. 2026-07-02 17:27 UTCOSV refresh
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  1. 2026-07-02 15:21 UTCEPSS rescore
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  29. 2026-06-14 15:13 UTCOSV refresh
  30. 2026-06-13 22:57 UTCEPSS rescore
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  49. 2026-05-31 22:28 UTCEPSS rescore
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  51. 2026-05-31 00:14 UTCEPSS rescore
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  53. 2026-05-29 13:41 UTCEPSS rescore
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  55. 2026-05-28 13:42 UTCEPSS rescore
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  58. 2026-05-27 13:38 UTCEPSS rescore
  59. 2026-05-27 13:38 UTCEPSS rescore
  60. 2026-05-27 12:14 UTCEG score recompute
  61. 2026-05-26 13:41 UTCEPSS rescore
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  63. 2026-05-26 07:16 UTCEPSS rescore
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  65. 2026-05-24 16:43 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-24086✓ verified
    First seen Jan 13, 2013

    phlyLabs phlyMail Lite 4.03.04 - 'go' Open Redirect

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2013-5123?
CVE-2013-5123 is a medium vulnerability published on November 5, 2019. 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.
When was CVE-2013-5123 disclosed?
CVE-2013-5123 was first published in the National Vulnerability Database on November 5, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-5123 actively exploited?
CVE-2013-5123 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2013-5123?
CVE-2013-5123 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2013-5123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-5123, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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