CVE-2022-39338

Summary

user_oidc is an OpenID Connect user backend for Nextcloud. Versions prior to 1.2.1 did not properly validate discovery urls which may lead to a stored cross site scripting attack vector. The impact is limited due to the restrictive CSP that is applied on this endpoint. Additionally this vulnerability has only been shown to be exploitable in the Safari web browser. This issue has been addressed in version 1.2.1. Users are advised to upgrade. Users unable to upgrade should urge their users to avoid using the Safari web browser.

Affected Software

Weaknesses

• CWE-20: CWE-20: Improper Input Validation
• CWE-79: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57
• https://github.com/nextcloud/user_oidc/pull/496
• https://hackerone.com/reports/1687410

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57
• https://github.com/nextcloud/user_oidc/pull/496
• https://hackerone.com/reports/1687410

• ←Previous
• Next→