GHSA-v4xv-795h-rv4h
HIGHXSS potential in rendered Markdown fields (comments, description, notes, etc.)
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
nautobot🐍nautobotReal-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
Impact
All users of Nautobot versions earlier than 1.6.10 or 2.1.2 are potentially impacted.
Due to inadequate input sanitization, any user-editable fields that support Markdown rendering, including:
Circuit.commentsCluster.commentsCustomField.descriptionDevice.commentsDeviceRedundancyGroup.commentsDeviceType.commentsJob.descriptionJobLogEntry.messageLocation.commentsNote.notePowerFeed.commentsProvider.noc_contactProvider.admin_contactProvider.commentsProviderNetwork.commentsRack.commentsTenant.commentsVirtualMachine.comments- Contents of any custom fields of type
markdown - Job class
descriptionattributes - The
SUPPORT_MESSAGEsystem configuration setting
are potentially susceptible to cross-site scripting (XSS) attacks via maliciously crafted data.
Patches
Fixed in Nautobot versions 1.6.10 and 2.1.2.
References
https://github.com/nautobot/nautobot/pull/5133 https://github.com/nautobot/nautobot/pull/5134
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | nautobot | ≥ 2.0.0&&< 2.1.2 | 2.1.2 |
| 🐍PyPI | nautobot | all versions | 1.6.10 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nautobot. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update nautobot to 2.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-v4xv-795h-rv4h is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-v4xv-795h-rv4h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-v4xv-795h-rv4h. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-v4xv-795h-rv4h in your dependencies?
O3 detects GHSA-v4xv-795h-rv4h across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.