CVE-2022-31157: Use of a Broken or Risky Cryptographic Algorithm in packbackbooks/lti-1-3-php-library

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-07-15 · updated 2026-06-17
Weakness: CWE-327

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 function used to generate random nonces was not sufficiently cryptographically complex. Users should upgrade to version 5.0 to receive a patch. There are currently no known workarounds.

Affected products

packbackbooks lti-1-3-php-library: before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: packbackbooks lti-1-3-php-library 5.0.0. Check the vendor advisory for mitigations.

References

https://github.com/packbackbooks/lti-1-3-php-library/security/advisories/GHSA-768m-5w34-2xf5
https://github.com/packbackbooks/lti-1-3-php-library/security/advisories/GHSA-768m-5w34-2xf5

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