Auth bypass in Zulip
CVE-2023-32678
Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Users who used to be subscribed to a private stream and have been removed from it since retain the ability to edit messages/topics, move messages to other streams, and delete messages that they used to have access to, if other relevant organization permissions allow these actions. For example, a user may be able to edit or delete their old messages they posted in such a private stream. An administrator will be able to delete old messages (that they had access to) from the private stream. This issue was fixed in Zulip Server version 7.3.
EPSS: 0.005 (39.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Zulip — versions < 7.3
- Zulip Zulip_server
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2023-32678?
- CVE-2023-32678 is a medium-severity vulnerability in Zulip, classified under Improper Authorization. CVSS score: 6.5/10. Published 2023-08-25.
- How severe is CVE-2023-32678?
- Medium severity. CVSS v3 base score is 6.5 out of 10.