CVE-2015-3880 is a medium-severity (CVSS 6.1) Open Redirect vulnerability in phpbb/phpbb. A fix is available for phpbb/phpbb — see the affected versions and patch details below.
phpBB Open Redirect
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
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
Open redirect vulnerability in phpBB before 3.0.14 and 3.1.x before 3.1.4 allows remote attackers to redirect users of Google Chrome to arbitrary web sites and conduct phishing attacks via unspecified vectors.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | phpbb/phpbb | all versions | 3.0.14composer require phpbb/phpbb:^3.0.14 |
| 🐘Packagist | phpbb/phpbb | ≥ 3.1.0&&< 3.1.4 | 3.1.4composer require phpbb/phpbb:^3.1.4 |
Affected Products
phpbbphpbbDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for phpbb/phpbb, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update phpbb/phpbb to 3.0.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-3880 is resolved across your whole dependency graph.
Workarounds
Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.
Frequently Asked Questions
Is CVE-2015-3880 in your dependencies?
Find it across Packagist, including transitive dependencies.