CVE-2023-25161 Nextcloud Server's missing rate limiting on password reset functionality allows sending lots of emails
Attackers can trigger excessive password reset emails, causing service slowdowns, storage overflow, or financial costs due to missing rate limiting.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-25161?
CVE-2023-25161 is a low-severity denial of service vulnerability in Nextcloud Nextcloud Server, published on 13 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform. Nextcloud Server and Nextcloud Enterprise Server prior to versions 25.0.1 24.0.8, and 23.0.12 missing rate limiting on password reset functionality. This could result in service slowdown, storage overflow, or cost impact when using external email services. Users should upgrade to Nextcloud Server 25.0.1, 24.0.8, or 23.0.12 or Nextcloud Enterprise Server 25.0.1, 24.0.8, or 23.0.12 to receive a patch. No known workarounds are available.
Weakness: CWE-284
Which versions are affected by CVE-2023-25161?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-25161?
No fix has been published for CVE-2023-25161 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-25161 being exploited?
There is no known exploitation of CVE-2023-25161 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-492h-596q-xr2f.