How severe is GHSA-99r5-84gr-59f6?

GHSA-99r5-84gr-59f6 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-99r5-84gr-59f6?

GHSA-99r5-84gr-59f6 affects the following packages: leantime/leantime (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-99r5-84gr-59f6?

Update leantime/leantime to 3.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-99r5-84gr-59f6 is resolved across your whole dependency graph.

How do I detect GHSA-99r5-84gr-59f6 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for leantime/leantime. 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.

How do I mitigate GHSA-99r5-84gr-59f6 if there is no patch (or I can't update yet)?

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 does O3 Security protect against GHSA-99r5-84gr-59f6?

O3 pinpoints whether GHSA-99r5-84gr-59f6 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-99r5-84gr-59f6 actively exploited in the wild?

No public exploit code has been indexed for GHSA-99r5-84gr-59f6 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.

When was GHSA-99r5-84gr-59f6 published, and has it been updated?

GHSA-99r5-84gr-59f6 was published on February 21, 2025 and was last updated on February 21, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

GHSA-99r5-84gr-59f6: Leantime has Host Header Injection Vulnera…

Blast Radius

1 pkg affected

🐘leantime/leantime

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

Description

Summary

A host header injection vulnerability has been identified in the user details viewing functionality of the system. This vulnerability allows an attacker to manipulate the host header in HTTP requests, thereby gaining unauthorized access to view details of other users.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`leantime/leantime`	all versions	3.1.2

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for leantime/leantime. 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 leantime/leantime to 3.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-99r5-84gr-59f6 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-99r5-84gr-59f6 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-99r5-84gr-59f6. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary A host header injection vulnerability has been identified in the user details viewing functionality of the system. This vulnerability allows an attacker to manipulate the host header in HTTP requests, thereby gaining unauthorized access to view details of other users.

O3 Security · Impact-Aware SCA

Is GHSA-99r5-84gr-59f6 in your dependencies?

O3 detects GHSA-99r5-84gr-59f6 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works

GHSA-99r5-84gr-59f6