CVE-2022-31158
HIGHCVE-2022-31158 is a high-severity (CVSS 7.5) CWE-294 vulnerability in packbackbooks/lti-1-3-php-library. O3 Security confirms whether CVE-2022-31158 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Authentication Bypass by Capture-replay in packbackbooks/lti-1-3-php-library
Blast Radius
packbackbooks/lti-1-3-php-libraryReal-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
LTI 1.3 Tool Library is a library used for building IMS-certified LTI 1.3 tool providers in PHP. Prior to version 5.0, the Nonce Claim Value was not being validated against the nonce value sent in the Authentication Request. Users should upgrade to version 5.0 to receive a patch. There are currently no known workarounds.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | packbackbooks/lti-1-3-php-library | all versions | 5.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for packbackbooks/lti-1-3-php-library. 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 packbackbooks/lti-1-3-php-library to 5.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-31158 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 CVE-2022-31158 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-2022-31158. 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-2022-31158 in your dependencies?
O3 detects CVE-2022-31158 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.