CVE-2015-5963

CVE-2015-5963 is a medium-severity vulnerability in Djangoproject Django with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Djangoproject Django
• Published: 2015-08-24
• Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2015-5963?

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.

How severe is CVE-2015-5963?

CVE-2015-5963 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-5963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5963?

CVE-2015-5963 primarily affects Djangoproject Django. In total, 43 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-5963 published?

CVE-2015-5963 was published on 2015-08-24 and last updated on 2026-06-17.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172084.html
• http://lists.opensuse.org/opensuse-updates/2015-09/msg00026.html
• http://lists.opensuse.org/opensuse-updates/2015-09/msg00035.html
• http://rhn.redhat.com/errata/RHSA-2015-1766.html
• http://rhn.redhat.com/errata/RHSA-2015-1767.html
• http://rhn.redhat.com/errata/RHSA-2015-1894.html
• http://www.debian.org/security/2015/dsa-3338
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
• http://www.securityfocus.com/bid/76428
• http://www.securitytracker.com/id/1033318
• http://www.ubuntu.com/usn/USN-2720-1
• https://access.redhat.com/errata/RHSA-2015:1876
• https://www.djangoproject.com/weblog/2015/aug/18/security-releases/

Affected products (43)

• cpe:2.3:a:djangoproject:django:1.4:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.4:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.6:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.7:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.8:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.9:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.10:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.11:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.12:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.13:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.14:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.17:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.19:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.20:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.4.21:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:beta1:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:beta2:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:beta3:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:beta4:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:rc1:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:rc2:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7:rc3:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.2:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.4:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.5:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.6:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.7:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.8:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.7.9:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.8:beta1:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.8.1:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.8.2:*:*:*:*:*:*:*
• cpe:2.3:a:djangoproject:django:1.8.3:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*

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All CVEs affecting Djangoproject Django →

Other CWE-399 (Resource Management Errors) vulnerabilities

• CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
• CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
• CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →