Vulnerability identifier: #VU75180

Vulnerability risk: Low

CVSSv3.1: 3.1 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-30540

CWE-ID: CWE-657

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Talk
Client/Desktop applications / Messaging software

Vendor: Nextcloud

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to violation of secure design principles. A remote user that was added later to a conversation can get access to data that was deleted before they were added to the conversation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Talk: 15.0.0 - 15.0.4

---

External links
http://github.com/nextcloud/security-advisories/security/advisories/GHSA-c9hr-cq65-9mjw
http://github.com/nextcloud/spreed/pull/8985
http://hackerone.com/reports/1894676

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.