CVE-2015-5303

OpenStack TripleO Heat templates spoof metadata requests

7.5 HighFix available

The TripleO Heat templates (tripleo-heat-templates), when deployed via the commandline interface, allow remote attackers to spoof OpenStack Networking metadata requests by leveraging knowledge of the default value of the NeutronMetadataProxySharedSecret parameter.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

1.67%Up 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2015-5303
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-254
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-5303
Updated: 2026-11-02

EUVDEUVD-2016-0035 No score

Record: EUVD-2016-0035
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m94p-8942-pm49 8.7

OpenStack TripleO Heat templates spoof metadata requests

Record: GHSA-m94p-8942-pm49
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGHSA-m94p-8942-pm49 8.7

OpenStack TripleO Heat templates spoof metadata requests

Record: GHSA-m94p-8942-pm49
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2015-5303 7.5

Record: UBUNTU-CVE-2015-5303
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVPYSEC-2016-35 No score

Record: PYSEC-2016-35
Updated: 2026-11-02

Affected products

openstack tripleo heat templates

Affected packages

Affected packages
Package	Affected	Fixed
`tripleo-heat-templates` PyPI	before 0.8.10	0.8.10
`tripleo-heat-templates` PyPI	before 0.8.10, plus listed versions 0.5.60.6.00.6.10.6.20.6.3 Show 21 moreShow less 0.6.40.7.00.7.10.7.20.7.30.7.40.7.50.7.60.7.70.7.80.7.90.8.00.8.10.8.20.8.30.8.40.8.50.8.60.8.70.8.80.8.9	0.8.10
`tripleo-heat-templates` PyPI	before 0.8.9, plus listed versions 0.5.60.6.00.6.10.6.20.6.3 Show 20 moreShow less 0.6.40.7.00.7.10.7.20.7.30.7.40.7.50.7.60.7.70.7.80.7.90.8.00.8.10.8.20.8.30.8.40.8.50.8.60.8.70.8.8	0.8.9
`openstack-tripleo-heat-templates` Red Hat:openstack-director:7::el7	before 0:0.8.6-94.el7ost	0:0.8.6-94.el7ost
`python-rdomanager-oscplugin` Red Hat:openstack-director:7::el7	before 0:0.0.10-22.el7ost	0:0.0.10-22.el7ost
`tripleo-heat-templates` Ubuntu:16.04:LTS	All versions, plus listed versions 0.6.1-1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-5303 is a high vulnerability (CVSS 7.5) in Openstack Tripleo Heat Templates, published April 11, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.67%, the 76th percentile. Fixed in tripleo-heat-templates 0.8.10.

References

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