CVE-2023-39953
Medium
Description
user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, missing verification of the issuer would have allowed an attacker to perform a man-in-the-middle attack returning corrupted or known token they also have access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.
SeverityMedium
CVSS4.8
Exploit probability46. percentile0.5%
Product
Nextcloud User Oidc
PublishedAug 10, 2023
First seenAug 10, 2023
Weakness typeCWE-303CWE-303
How to fix
Update
- nextcloud user_oidc1.3.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud user_oidc | 1.0.0 ≤ v < 1.3.3 | 1.3.3 |
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