CVE-2022-39338 json
Stored cross site scripting (XSS) vulnerability via Authorization Endpoint in user_oidc
published 2022-11-25 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-41814
- cvss
- 3.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected products
- nextcloud security-advisories
Classification
References
-
github.com
/nextcloud/user_oidc/pull/496
patch, third-party-advisory
-
github.com
/nextcloud/security-advisories/security/advisories/GHSA-5fpw-795h-rg57
third-party-advisory
-
hackerone.com
/reports/1687410
permissions-required, third-party-advisory
Sources
- CVE List CVE-2022-39338
- NVD CVE-2022-39338
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