CVE-2018-3761

Description

Nextcloud Server before 12.0.8 and 13.0.3 suffer from improper authentication on the OAuth2 token endpoint. Missing checks potentially allowed handing out new tokens in case the OAuth2 client was partly compromised.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.63%
Vendor Advisory nextcloud.com
Affected: Nextcloud Nextcloud Server
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/343111 third party advisory
https://nextcloud.com/security/advisory/?id=nc-sa-2018-003 vendor advisory broken link

Frequently Asked Questions

What is the severity of CVE-2018-3761?
CVE-2018-3761 has been scored as a high severity vulnerability.
How to fix CVE-2018-3761?
To fix CVE-2018-3761, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-3761 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-3761 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-3761?
CVE-2018-3761 affects Nextcloud Nextcloud Server.
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