Zulip: >> Zulip Server >> 1.3.13 Security Vulnerabilities
Zulip is an open-source team collaboration tool. It was discovered by the Zulip development team that active users who had previously been subscribed to a stream incorrectly continued being able to use the Zulip API to access metadata for that stream. As a result, users who had been removed from a stream, but still had an account in the organization, could still view metadata for that stream (including the stream name, description, settings, and an email address used to send emails into the stream via the incoming email integration). This potentially allowed users to see changes to a stream’s metadata after they had lost access to the stream. This vulnerability has been addressed in version 7.5 and all users are advised to upgrade. There are no known workarounds for this issue.
CVSS Score
4.3
EPSS Score
0.004
Published
2023-11-16
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.
CVSS Score
6.5
EPSS Score
0.0
Published
2023-08-25
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of replies to messages sent by outgoing webhooks to private streams meant that an outgoing webhook bot could be used to send messages to private streams that the user was not intended to be able to send messages to.
CVSS Score
4.3
EPSS Score
0.002
Published
2021-04-15
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the can_forge_sender permission (previously is_api_super_user) resulted in users with this permission being able to send messages appearing as if sent by a system bot, including to other organizations hosted by the same Zulip installation.
CVSS Score
4.3
EPSS Score
0.001
Published
2021-04-15
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of the all_public_streams API feature resulted in guest users being able to receive message traffic to public streams that should have been only accessible to members of the organization.
CVSS Score
5.3
EPSS Score
0.002
Published
2021-04-15
Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.
CVSS Score
6.1
EPSS Score
0.004
Published
2020-08-21
Zulip Server before 2.1.5 allows reverse tabnapping via a topic header link.
CVSS Score
5.4
EPSS Score
0.002
Published
2020-08-21
Zulip Server before 2.1.5 has Incorrect Access Control because 0198_preregistrationuser_invited_as adds the administrator role to invitations.
CVSS Score
7.5
EPSS Score
0.002
Published
2020-08-21
Zulip Server 2.x before 2.1.7 allows eval injection if a privileged attacker were able to write directly to the postgres database, and chose to write a crafted custom profile field value.
CVSS Score
8.8
EPSS Score
0.007
Published
2020-08-21
Zulip Server before 2.1.3 allows XSS via a Markdown link, with resultant account takeover.
CVSS Score
5.4
EPSS Score
0.003
Published
2020-04-20
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