CVE-2021-30477
Medium
Description
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.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Zulip Server
PublishedApr 15, 2021
First seenApr 15, 2021
How to fix
Update
- zulip zulip_server3.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zulip zulip_server | v < 3.4 | 3.4 |
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