CVE-2025-13261
CVE-2025-13261 is a Path Traversal vulnerability in lsfusion.platform:web-client. O3 Security confirms whether CVE-2025-13261 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
lsfusion platform DownloadFileRequestHandler.java DownloadFileRequestHandler path traversal
Real-World Exposure
lsfusion.platform:web-clientReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
A vulnerability was found in lsfusion platform up to 6.1. Affected is the function DownloadFileRequestHandler of the file web-client/src/main/java/lsfusion/http/controller/file/DownloadFileRequestHandler.java. Performing manipulation of the argument Version results in path traversal. Remote exploitation of the attack is possible. The exploit has been made public and could be used.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | lsfusion.platform:web-client | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for lsfusion.platform:web-client. 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.
Remediation status
No patched version of lsfusion.platform:web-client has shipped for CVE-2025-13261 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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 CVE-2025-13261 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 CVE-2025-13261. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-13261 in your dependencies?
O3 detects CVE-2025-13261 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.