Zulip
CVE-2023-32678
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-285. 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. Affected products include: Zulip Zulip Server. Version information: version 7.3..
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
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.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)NVD
Zulip is an open source team chat server. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable,
Zulip is an open-source team collaboration tool with topic-based threading. Rated critical severity (CVSS 9.8), this vul
In Zulip Server versions from 1.7.0 to before 2.0.7, a bug in the new user signup process meant that users who registere
Zulip Server before 2.1.3 allows XSS via a Markdown link, with resultant account takeover. Rated medium severity (CVSS 5
Authentication bypass in Zulip Server through 12.1 can log an attacker into an existing user account when OIDC single si
In Zulip Server before 1.7.1, on a server with multiple realms, a vulnerability in the invitation system lets an authori
Zulip is an open source team chat tool. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low
Zulip Server 2.x before 2.1.7 allows eval injection if a privileged attacker were able to write directly to the postgres
Zulip is an open-source team collaboration tool. Rated high severity (CVSS 8.2), this vulnerability is remotely exploita
Jenkins Zulip Plugin 1.1.0 and earlier stored credentials unencrypted in its global configuration file on the Jenkins ma
Zulip from 8.0 to 8.3 contains a memory leak vulnerability in the handling of popovers. Rated high severity (CVSS 7.5),
Zulip Server before 2.1.5 has Incorrect Access Control because 0198_preregistrationuser_invited_as adds the administrato
Exploit-DB