CVE-2022-39338

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.

CVSS v3.0 5.4 MEDIUM

5.4^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57	Third Party Advisory
https://github.com/nextcloud/user_oidc/pull/496	Patch Third Party Advisory
https://hackerone.com/reports/1687410	Permissions Required Third Party Advisory

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:a:nextcloud:openid_connect_user_backend:*:*:*:*:*:nextcloud:*:*

Information

Published : 2022-11-25 11:15

Updated : 2022-12-01 12:43

NVD link : CVE-2022-39338

Mitre link : CVE-2022-39338

JSON object : View

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-20

Improper Input Validation

Advertisement

Products Affected

nextcloud

openid_connect_user_backend

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57", "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57", "tags": ["Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "https://github.com/nextcloud/user_oidc/pull/496", "name": "https://github.com/nextcloud/user_oidc/pull/496", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://hackerone.com/reports/1687410", "name": "https://hackerone.com/reports/1687410", "tags": ["Permissions Required", "Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-20"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-39338", "ASSIGNER": "security-advisories@github.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}}, "publishedDate": "2022-11-25T19:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:nextcloud:openid_connect_user_backend:*:*:*:*:*:nextcloud:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "1.2.1"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-12-01T20:43Z"}