CVE-2023-30540 Chat poll data can still be queried from API after purging history in Nextcloud talk
Users added to a conversation can access deleted chat poll data via the API, exposing previously purged information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-30540?
CVE-2023-30540 is a low-severity vulnerability in nextcloud security-advisories, published on 17 Apr 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Nextcloud Talk is a chat, video & audio call extension for Nextcloud. In affected versions a user that was added later to a conversation can use this information to get access to data that was deleted before they were added to the conversation. This issue has been patched in version 15.0.5 and it is recommended that users upgrad to 15.0.5. There are no known workarounds for this issue.
Weakness: CWE-200
Which versions are affected by CVE-2023-30540?
It affects 1 product.
Products include Nextcloud Talk.
How do I fix CVE-2023-30540?
No fix has been published for CVE-2023-30540 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-30540 being exploited?
There is no known exploitation of CVE-2023-30540 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
- CVE-2020-8180 Code injection in Nextcloud Talk
- CVE-2021-32689 Nextcloud Talk not properly disassociating users from chats after account deletion
- CVE-2023-39957 Path traversal allows tricking the Talk Android app into writing files into it's root directory
- CVE-2021-32676 Session Fixation in Nextcloud Talk
- CVE-2021-39222 XSS in Talk
Sources
Also known as GHSA-c9hr-cq65-9mjw.