CVE-2009-5145 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in zope2. A fix is available for zope2 — see the affected versions and patch details below.
Zope Cross-site scripting (XSS) vulnerability in ZMI pages
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
zope2Real-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 ZMI pages that use the manage_tabs_message in Zope 2.11.4, 2.11.2, 2.10.9, 2.10.7, 2.10.6, 2.10.5, 2.10.4, 2.10.2, 2.10.1, 2.12.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | zope2 | all versions | 2.12.5pip install --upgrade 'zope2==2.12.5' |
Affected Products
zopezopeDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zope2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update zope2 to 2.12.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2009-5145 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.
Frequently Asked Questions
Is CVE-2009-5145 in your dependencies?
Find it across PyPI, including transitive dependencies.