Vulnerability Details : CVE-2023-28848
user_oidc is the OIDC connect user backend for Nextcloud, an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.
Vulnerability category: Cross-site request forgery (CSRF)
Products affected by CVE-2023-28848
- cpe:2.3:a:nextcloud:user_oidc:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-28848
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-28848
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.4
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
2.8
|
2.5
|
NIST | |
|
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
GitHub, Inc. |
CWE ids for CVE-2023-28848
-
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-28848
-
https://github.com/nextcloud/user_oidc/pull/580
Do not expose the expected code when it does not match by julien-nc · Pull Request #580 · nextcloud/user_oidc · GitHubPatch;Vendor Advisory
-
https://hackerone.com/reports/1878381
HackerOneThird Party Advisory
-
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-52hv-xw32-wf7f
CSRF protection on user_oidc login returned the expected token in case of an error · Advisory · nextcloud/security-advisories · GitHubVendor Advisory
Jump to