CVE-2023-45660 Require strict cookies for image proxy requests in Nextcloud Mail
Attackers can abuse the image proxy endpoint to cause denial of service on third-party servers due to missing origin and cookie checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-45660?
CVE-2023-45660 is a medium-severity server-side request forgery vulnerability in nextcloud security-advisories, published on 16 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0. There are no known workarounds for this vulnerability.
Weakness: CWE-918
Which versions are affected by CVE-2023-45660?
It affects 1 product.
Products include Nextcloud Mail.
How do I fix CVE-2023-45660?
No fix has been published for CVE-2023-45660 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2023-45660 being exploited?
There is no known exploitation of CVE-2023-45660 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
- CVE-2021-32652 Missing permission check on email metadata retrieval
- CVE-2022-31132 Unauthenticated SSRF in 3rd party module "cerdic/csstidy"
- CVE-2024-52508 Nextcloud Mail auto configurator can be tricked into sending account information to wrong servers
- CVE-2023-23943 Blind SSRF via server URL input in the Nextcloud Mail app
- CVE-2021-32707 Bypass of image blocking in Nextcloud Mail
Sources
Also known as GHSA-8j9x-fmww-qr37.