CVE-2015-5963

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 5.2% 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
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.

contrib.sessions.middleware.SessionMiddleware in Django 1.8.x before 1.8.4, 1.7.x before 1.7.10, 1.4.x before 1.4.22, and possibly other versions allows remote attackers to cause a denial of service (session store consumption or session record removal) via a large number of requests to contrib.auth.views.logout, which triggers the creation of an empty session record.

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
92%
KEV
Not listed

Published

August 24, 2015

Last Modified

May 6, 2026

References (26)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython-django-doc (1.6.1-2ubuntu0.10) @ trusty2026-05-22ubuntu
redhatpython-django-0:1.6.11-3.el7ost2015-10-15redhat
redhatpython-django-0:1.8.4-1.el72015-10-08redhat
redhatpython-django-0:1.6.11-3.el6ost2015-09-10redhat

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

(8 across 8 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
python-django—1.7.10-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-django—1.7.10-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-django—1.7.10-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-django—1.7.10-1—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
python-django1.2.3-3 ... 1.2.3-3+squeeze9 (13 versions)1.2.3-3+squeeze14—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
python-django1.4.5-1 ... 1.4.5-1+deb7u9 (18 versions)1.4.5-1+deb7u13—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
python-django1.7.7-1, 1.7.7-1+deb8u11.7.7-1+deb8u2—
PyPI(1)
PackageVulnerable rangeFixed inDependents
django1.4 ... 1.8.3 (36 versions)1.4.22—

All Vendor Advisories

(5)

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 6× in last 7d / 21× 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 142 total refreshes for this CVE.

  1. 2026-09-19 08:36 UTCOSV refresh
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:21 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
  5. 2026-09-13 16:41 UTCEPSS rescore
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  15. 2026-08-31 12:04 UTCOSV refresh
  16. 2026-08-27 14:20 UTCEPSS rescore
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  24. 2026-08-16 14:51 UTCEPSS rescore
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  1. 2026-08-15 01:25 UTCEPSS rescore
  2. 2026-08-14 17:24 UTCOSV refresh
  3. 2026-08-12 13:46 UTCEPSS rescore
  4. 2026-08-11 13:36 UTCEPSS rescore
  5. 2026-08-09 13:42 UTCEPSS rescore
  6. 2026-08-08 16:32 UTCEPSS rescore
  7. 2026-08-07 16:22 UTCEPSS rescore
  8. 2026-08-06 13:42 UTCEPSS rescore
  9. 2026-08-05 19:12 UTCEPSS rescore
  10. 2026-08-04 15:04 UTCEPSS rescore
  11. 2026-08-04 10:31 UTCEPSS rescore
  12. 2026-08-01 04:11 UTCEPSS rescore
  13. 2026-07-30 06:24 UTCOSV refresh
  14. 2026-07-30 01:26 UTCEPSS rescore
  15. 2026-07-30 01:26 UTCEPSS rescore
  16. 2026-07-28 15:31 UTCEPSS rescore
  17. 2026-07-26 13:54 UTCEG score recompute▲ 5.00
  18. 2026-07-25 14:13 UTCEPSS rescore
  19. 2026-07-24 14:13 UTCEPSS rescore
  20. 2026-07-23 14:14 UTCEPSS rescore
  21. 2026-07-23 01:18 UTCEG score recompute
  22. 2026-07-23 00:20 UTCEG score recompute
  23. 2026-07-22 21:59 UTCEG score recompute
  24. 2026-07-22 14:04 UTCEPSS rescore
  25. 2026-07-21 15:21 UTCEPSS rescore
  26. 2026-07-21 15:21 UTCEPSS rescore
  27. 2026-07-20 17:03 UTCEPSS rescore
  28. 2026-07-19 14:27 UTCEPSS rescore
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  30. 2026-07-19 02:26 UTCEPSS rescore
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  36. 2026-07-15 01:56 UTCEPSS rescore
  37. 2026-07-13 22:26 UTCEPSS rescore
  38. 2026-07-13 22:26 UTCEPSS rescore
  39. 2026-07-12 15:37 UTCOSV refresh
  40. 2026-07-12 05:42 UTCEPSS rescore
  41. 2026-07-11 08:23 UTCEPSS rescore
  42. 2026-07-09 19:05 UTCEPSS rescore
  43. 2026-07-09 19:05 UTCEPSS rescore
  44. 2026-07-08 15:10 UTCEPSS rescore
  45. 2026-07-06 16:24 UTCEPSS rescore
  46. 2026-07-06 02:20 UTCEPSS rescore
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  48. 2026-07-04 06:28 UTCEPSS rescore
  49. 2026-07-01 15:02 UTCEPSS rescore
  50. 2026-06-30 23:19 UTCEPSS rescore
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  62. 2026-06-23 21:00 UTCOSV refresh
  63. 2026-06-22 14:23 UTCEPSS rescore
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  65. 2026-06-21 14:54 UTCEPSS rescore
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  67. 2026-06-21 01:57 UTCEPSS rescore
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  69. 2026-06-19 19:23 UTCEPSS rescore
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  71. 2026-06-18 17:50 UTCEPSS rescore
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  74. 2026-06-16 17:50 UTCEPSS rescore
  75. 2026-06-16 17:50 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-5963?
CVE-2015-5963 is a medium vulnerability published on August 24, 2015. contrib.sessions.middleware.SessionMiddleware in Django 1.8.x before 1.8.4, 1.7.x before 1.7.10, 1.4.x before 1.4.22, and possibly other versions allows remote attackers to cause a denial of service (session store consumption or session record removal) via a large number of requests to…
When was CVE-2015-5963 disclosed?
CVE-2015-5963 was first published in the National Vulnerability Database on August 24, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-5963 actively exploited?
CVE-2015-5963 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 7.9% of all scored CVEs.
How do I remediate CVE-2015-5963?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-5963, 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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