CVE-2013-1664

MEDIUMCVSS v2 · 5.05.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:N/I:N/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 4.9% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Trending — 3 sources updated this week
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS v2: 5.0Exploit: None knownExposed: 0

A fix is available — apply it.

The XML libraries for Python 3.4, 3.3, 3.2, 3.1, 2.7, and 2.6, as used in OpenStack Keystone Essex, Folsom, and Grizzly; Compute (Nova) Essex and Folsom; Cinder Folsom; Django; and possibly other products allow remote attackers to cause a denial of service (resource consumption and crash) via an XML Entity Expansion (XEE) attack.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0(low)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity50% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

April 3, 2013

Last Modified

April 29, 2026

References (20)

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython-nova (2012.1.3+stable-20120827-4d2a4afe-0ubuntu1.2) @ precise2026-05-29ubuntu
ubuntupython-keystone (2012.2.1-0ubuntu1.2) @ quantal2026-05-29ubuntu
ubuntupython-cinder (2012.2.1-0ubuntu1.1) @ quantal2026-05-29ubuntu
ubuntupython-django (1.3.1-4ubuntu1.6) @ precise2026-05-29ubuntu
redhatopenstack-cinder-0:2012.2.3-4.el6ost2013-03-21redhat
redhatDjango14-0:1.4.4-1.el6ost2013-03-21redhat
redhatopenstack-nova-0:2012.2.3-4.el6ost2013-03-21redhat
redhatopenstack-keystone-0:2012.2.3-3.el6ost2013-03-05redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
django1.3 ... 1.4.3 (10 versions)1.4.4—

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 38× 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.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-26 13:47 UTCEG score recompute▲ 5.00
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-23 14:14 UTCEPSS rescore
  4. 2026-07-23 01:09 UTCEG score recompute
  5. 2026-07-23 00:12 UTCEG score recompute
  6. 2026-07-22 21:51 UTCEG score recompute
  7. 2026-07-22 14:04 UTCEPSS rescore
  8. 2026-07-22 14:04 UTCEPSS rescore
  9. 2026-07-22 13:18 UTCOSV refresh
  10. 2026-07-21 15:21 UTCEPSS rescore
  11. 2026-07-20 17:03 UTCEPSS rescore
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  1. 2026-07-08 15:10 UTCEPSS rescore
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  4. 2026-07-05 08:59 UTCOSV refresh
  5. 2026-07-05 02:26 UTCEPSS rescore
  6. 2026-07-04 06:27 UTCEPSS rescore
  7. 2026-07-01 15:02 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
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  26. 2026-06-18 17:49 UTCEPSS rescore
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  28. 2026-06-17 17:49 UTCEPSS rescore
  29. 2026-06-17 17:49 UTCEPSS rescore
  30. 2026-06-16 20:05 UTCOSV refresh
  31. 2026-06-16 17:49 UTCEPSS rescore
  32. 2026-06-16 17:49 UTCEPSS rescore
  33. 2026-06-15 17:44 UTCEPSS rescore
  34. 2026-06-14 23:14 UTCEPSS rescore
  35. 2026-06-13 22:57 UTCEPSS rescore
  36. 2026-06-12 23:08 UTCEPSS rescore
  37. 2026-06-11 13:56 UTCEPSS rescore
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  39. 2026-06-08 14:14 UTCEPSS rescore
  40. 2026-06-07 15:22 UTCEPSS rescore
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  49. 2026-06-01 13:49 UTCEPSS rescore
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  51. 2026-05-31 22:28 UTCEPSS rescore
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  53. 2026-05-31 00:14 UTCEPSS rescore
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  55. 2026-05-29 13:41 UTCEPSS rescore
  56. 2026-05-29 13:41 UTCEPSS rescore
  57. 2026-05-29 00:25 UTCEG score recompute
  58. 2026-05-29 00:25 UTCVendor advisory
  59. 2026-05-28 17:36 UTCOSV refresh
  60. 2026-05-28 13:42 UTCEPSS rescore
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  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 11:21 UTCEPSS rescore

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2013-1664?
CVE-2013-1664 is a medium vulnerability published on April 3, 2013. The XML libraries for Python 3.4, 3.3, 3.2, 3.1, 2.7, and 2.6, as used in OpenStack Keystone Essex, Folsom, and Grizzly; Compute (Nova) Essex and Folsom; Cinder Folsom; Django; and possibly other products allow remote attackers to cause a denial of service (resource consumption and crash) via an…
When was CVE-2013-1664 disclosed?
CVE-2013-1664 was first published in the National Vulnerability Database on April 3, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-1664 actively exploited?
CVE-2013-1664 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.9% of all scored CVEs.
How do I remediate CVE-2013-1664?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-1664, 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.

Dependency Blast Radius

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