Read the docs
TI-2022-13200 Aliases CVE-2022-31157GHSA-768m-5w34-2xf5

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

Priority LOW 39CWE-327Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-327.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00453 39th percentileScored 2026-11-07
Fix Fixed lti-1-3-php-library (packbackbooks): 5.0packbackbooks/lti-1-3-php-library (Packagist): 5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
packbackbookslti-1-3-php-librarybefore 5.05.0Patch availableCNA
—packbackbooks/lti-1-3-php-library (Packagist)before 5.05.0Patch availableGHSA-768m-5w34-2xf5
  • lti-1-3-php-library Vendorpackbackbooks Affected before 5.0 Fixed in 5.0 Patch available CNA
  • packbackbooks/lti-1-3-php-library (Packagist) Vendor— Affected before 5.0 Fixed in 5.0 Patch available GHSA-768m-5w34-2xf5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:packback:lti_1.3_tool_library:*:*:*:*:*:*:*:*before 5.0.0VulnerablePackback
  • cpe:2.3:a:packback:lti_1.3_tool_library:*:*:*:*:*:*:*:* Versions before 5.0.0 Vulnerable ·Packback

Remediation

  • Fix · CNA lti-1-3-php-library (packbackbooks) Fixed in 5.0
  • Fix · GHSA-768m-5w34-2xf5 packbackbooks/lti-1-3-php-library (Packagist) Fixed in 5.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-31157
  2. 2026-10-03 Alias added: GHSA-768m-5w34-2xf5

References

Advisory 2

Other 3

  • TI-2022-13201 Authentication Bypass by Capture-replay in packbackbooks/lti-1-3-php-library CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences