GHSA-7gm6-w7mx-58cr
HIGHGHSA-7gm6-w7mx-58cr is a high-severity (CVSS 8.1) CWE-640 vulnerability in phpbb/phpbb. O3 Security confirms whether GHSA-7gm6-w7mx-58cr is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
phpBB has Password Reset Link Poisoning via Host Header injection
Blast Radius
phpbb/phpbb🐘phpbb/phpbbReal-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
phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL. An attacker who can manipulate the Host header (e.g. through misconfigured host setup or missing header validation by the webserver) can cause password reset emails to contain a link pointing to an attacker-controlled domain, potentially leading to account takeover.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | phpbb/phpbb | ≥ 3.0.0&&< 3.3.16 | 3.3.16 |
| 🐘Packagist | phpbb/phpbb | ≥ 4.0.0-a1&&< 4.0.0-a2 | 4.0.0-a2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for phpbb/phpbb. 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 phpbb/phpbb to 3.3.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7gm6-w7mx-58cr 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-7gm6-w7mx-58cr 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-7gm6-w7mx-58cr. 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-7gm6-w7mx-58cr in your dependencies?
O3 detects GHSA-7gm6-w7mx-58cr across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.