CVE-2010-2491 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in roundup. A fix is available for roundup — see the affected versions and patch details below.
Roundup Cross-site Scripting (XSS) vulnerability
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
roundupReal-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 cgi/client.py in Roundup before 1.4.14 allows remote attackers to inject arbitrary web script or HTML via the template argument to the /issue program.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | roundup | all versions | 1.4.14pip install --upgrade 'roundup==1.4.14' |
Affected Products
rounduproundup-trackerDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for roundup, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update roundup to 1.4.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2010-2491 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-2010-2491 in your dependencies?
Find it across PyPI, including transitive dependencies.