How severe is GHSA-cmg8-5c63-pg95?

No CVSS score has been assigned to GHSA-cmg8-5c63-pg95 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-cmg8-5c63-pg95?

GHSA-cmg8-5c63-pg95 affects the following packages: horizon (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-cmg8-5c63-pg95?

Update horizon to 2013.2.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-cmg8-5c63-pg95 is resolved across your whole dependency graph.

How do I detect GHSA-cmg8-5c63-pg95 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for horizon, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-cmg8-5c63-pg95 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is GHSA-cmg8-5c63-pg95 actively exploited in the wild?

No public exploit code has been indexed for GHSA-cmg8-5c63-pg95 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-cmg8-5c63-pg95?

GHSA-cmg8-5c63-pg95 has an EPSS (Exploit Prediction Scoring System) score of 1.2%, placing it in the 69th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-cmg8-5c63-pg95?

GHSA-cmg8-5c63-pg95 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-cmg8-5c63-pg95 published, and has it been updated?

GHSA-cmg8-5c63-pg95 was published on May 14, 2022 and was last updated on July 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

OpenStack Dashboard (aka Horizon) vulnerable to…

EPSS Exploitation Probability

via FIRST.org ↗

1.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs69th percentile — riskier than 69% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐍horizon

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Cross-site scripting (XSS) vulnerability in the Horizon Orchestration dashboard in OpenStack Dashboard (aka Horizon) 2013.2 before 2013.2.4 and icehouse before icehouse-rc2 allows remote attackers to inject arbitrary web script or HTML via the description field of a Heat template.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`horizon`	≥ 2013.2&&< 2013.2.4	2013.2.4`pip install --upgrade 'horizon==2013.2.4'`

Affected Products

2 products · 5 configurations

Application

horizonopenstack

4 versions

2013.22013.2.12013.2.22013.2.3

OS

opensuseopensuse

1 version

13.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for horizon, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update horizon to 2013.2.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-cmg8-5c63-pg95 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatLow

Product	Fixed in	Advisory
OpenStack 4 for RHEL 6	`python-django-horizon-0:2013.2.3-1.el6ost`	RHSA-2014:0581

Frequently Asked Questions

Cross-site scripting (XSS) vulnerability in the Horizon Orchestration dashboard in OpenStack Dashboard (aka Horizon) 2013.2 before 2013.2.4 and icehouse before icehouse-rc2 allows remote attackers to inject arbitrary web script or HTML via the description field of a Heat template.

O3 Security · Impact-Aware SCA

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OpenStack Dashboard (aka Horizon) vulnerable to Cross-site ScriptingGHSA-cmg8-5c63-pg95