CVE-2023-30540

Name: CVE-2023-30540
Creator: NVD / NIST
Published: 2023-04-17T22:15:10.277+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-30540 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.66%

46.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Nextcloud	Talk	>= 15.0.0, < 15.0.5

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-c9hr-cq65-9mjwVendor Advisory
https://github.com/nextcloud/spreed/pull/8985Patch
https://hackerone.com/reports/1894676Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-c9hr-cq65-9mjwVendor Advisory
https://github.com/nextcloud/spreed/pull/8985Patch
https://hackerone.com/reports/1894676Permissions Required

Timeline

Published: Apr 17, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-30540?

How severe is CVE-2023-30540?

CVE-2023-30540 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-30540?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-30540?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST