Vendor
zulip
42 known vulnerabilities.
zulip at a glance
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 3 | 0 |
| Oct 2026 | 2 | 1 |
| Sep 2026 | 0 | 0 |
| Aug 2026 | 0 | 0 |
| Jul 2026 | 0 | 0 |
| Jun 2026 | 0 | 0 |
| May 2026 | 1 | 0 |
| Apr 2026 | 2 | 0 |
| Mar 2026 | 0 | 0 |
| Feb 2026 | 2 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 0 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 0 | 0 |
| Sep 2025 | 0 | 0 |
| Aug 2025 | 0 | 0 |
| Jul 2025 | 1 | 0 |
| Jun 2025 | 0 | 0 |
| May 2025 | 1 | 0 |
| Apr 2025 | 1 | 0 |
| Mar 2025 | 3 | 0 |
| Feb 2025 | 1 | 0 |
| Jan 2025 | 1 | 0 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
42 results · Feed
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Medium 6.5
Zulip: Saving a draft DM to a user bypasses can_access_all_users_group permission
Zulip is an open-source team collaboration tool. From 8.0 until 12.2, in organizations where the Who can view all other users in the organization setting restricted guests from viewing other users, saving or editing a direct message draft did not verify that …
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Medium 5.3CVE-2026-115574 Scanner template
Zulip: Custom profile fields can be read by logged-out visitors in organization with web-public channels
Zulip is an open-source team collaboration tool. From 11.0 until 12.2, organizations with web-public channels enabled exposed the GET /json/users endpoint to logged-out spectators, and a missing access-control check allowed include_custom_profile_fields=true …
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Medium 6.5
Zulip: Missing content-length limit on POST /messages/render allows denial-of-service via oversized requests
Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, the authenticated POST /messages/render endpoint renders the content parameter without enforcing the normal message length limit used by message send and edit operations. …
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Medium 6.5
Zulip: Guests can read new messages in non-subscribed public channels
Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, guest users can receive new message events for public channels outside their subscriptions. A guest can trigger the issue by registering an event queue with parameters tha…
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Critical 9.1
Zulip: OpenID Connect authentication ignores the email_verified claim
Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, GenericOpenIdConnectBackend matches the identity provider email claim to an active account's delivery_email without rejecting an explicitly false email_verified claim. If …
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Medium 6.0
Zulip: Message edit history visible in "moves only" policy through /api/v1/messages/{id}/history
Zulip is an open-source team collaboration tool. Prior to 12.0, With message_edit_history_visibility_policy set to "moves", /api/v1/messages/{id}/history still returns historical content values, allowing low-privilege users to recover text that was edited awa…
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Medium 6.1
Zulip: Path Traversal in Import
Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, ./manage.py import reads arbitrary files from the server filesystem via path traversal in uploads/records.json. A crafted export tarball causes the server to copy any …
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Medium 5.3
Zulip: Anonymous File Access After Disabling Spectator Access
Zulip is an open-source team collaboration tool. Prior to version 11.6, Zulip is an open-source team collaboration tool. From version 1.4.0 to before version 11.6, even after spectator access (enable_spectator_access / WEB_PUBLIC_STREAMS_ENABLED) is disabled,…
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High 7.1
Zulip Vulnerable to Modification of Payment Method (Stripe Default Card) by Non-Billing Users
Zulip is an open-source team collaboration tool. Prior to commit bf28c82dc9b1f630fa8e9106358771b20a0040f7, the API endpoint for creating a card update session during an upgrade flow was accessible to users with only organization member privileges. When the as…
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Low 1.1
Zulip affected by Stored XSS in user profile modal
Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profile were susceptible to stored XSS in group names or channel names. Exploiting these vulnerabilities required the user explicitly interacting…
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Medium 6.8
Zulip XSS in digest preview URL
Zulip is an open-source team chat application. From versions 2.0.0-rc1 to before 10.4 in Zulip Server, the /digest/ URL of a server shows a preview of what the email weekly digest would contain. This URL, though not the digest itself, contains a cross-site sc…
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Medium 5.3
Zulip Server has access control bypass for restrictions on creation of specific channel types
Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel pri…
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High 8.2
Zulip Authentication Backend Configuration Bypass
Zulip is an open-source team collaboration tool. Zulip supports a configuration where account creation is limited solely by being able to authenticate with a single-sign on authentication backend, meaning the organization places no restrictions on email addre…
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Low 2.7
Zulip allows the deletion of Custom profile fields by administrators of a different organization
Zulip is an open-source team collaboration tool. The API for deleting an organization custom profile field is supposed to be restricted to organization administrators, but its handler failed to check that the field belongs to the same organization as the user…
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Low 2.7
Zulip allows the deletion of organization by administrators of a different organization
Zulip is an open-source team collaboration tool. The API for deleting an organization export is supposed to be restricted to organization administrators, but its handler failed to check that the field belongs to the same organization as the user. Therefore, a…
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Medium 4.6
Zulip exports can leak private data
Zulip server provides an open-source team chat that helps teams stay productive and focused. Prior to 10.0, the data export to organization administrators feature in Zulip leaks private data. The collection of user-agent types identifying specific integration…
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Medium 4.3
Zulip events can leak private channel names
Zulip is an open source team chat application. A weekly cron job (added in 50256f48314250978f521ef439cafa704e056539) demotes channels to being "inactive" after they have not received traffic for 180 days. However, upon doing so, an event was sent to all users…
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Medium 6.9
/api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server
Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can m…
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Medium 6.5
Moving single messages from public to private streams leaves them accessible
Zulip is an open-source team collaboration tool. When a user moves a Zulip message, they have the option to move all messages in the topic, move only subsequent messages as well, or move just a single message. If the user chose to just move one message, and w…
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Medium 4.3
Zulip non-admins can invite new users to streams they would not otherwise be able to add existing users to
Zulip is an open-source team collaboration tool. A vulnerability in version 8.0 is similar to CVE-2023-32677, but applies to multi-use invitations, not single-use invitation links as in the prior CVE. Specifically, it applies when the installation has configu…
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Medium 4.3
Stream description leaks to ex-subscribers in Zulip
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 re…
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Medium 6.5
Zulip vulnerable to insufficient authorization check for edition/deletion of messages and topics in private streams by former subscribers
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…
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High 8.2
Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. The main development branch of Zulip Server from May 2, 2023 and later, including beta ve…
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Medium 6.5
Unauthorized user can register an account in specific configurations in Zulip
Zulip is an open-source team collaboration tool with unique topic-based threading. In the event that 1: `ZulipLDAPAuthBackend` and an external authentication backend (any aside of `ZulipLDAPAuthBackend` and `EmailAuthBackend`) are the only ones enabled in `AU…
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Low 3.1
Users who can send invitations can erroneously add users to streams during invitation in Zulip
Zulip is an open-source team collaboration tool with unique topic-based threading. Zulip administrators can configure Zulip to limit who can add users to streams, and separately to limit who can invite users to the organization. In Zulip Server 6.1 and below,…
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Medium 4.4
User uploads proxied from S3 lack `Content-Security-Policy` headers, may be served with `Content-Disposition: inline` in zulip
Zulip is an open-source team collaboration tool. In versions of zulip prior to commit `2f6c5a8` but after commit `04cf68b` users could upload files with arbitrary `Content-Type` which would be served from the Zulip hostname with `Content-Disposition: inline` …
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Low 3.7
Non-constant-time SCIM token comparison in Zulip Server
Zulip is an open-source team collaboration tool. For organizations with System for Cross-domain Identity Management(SCIM) account management enabled, Zulip Server 5.0 through 5.6 checked the SCIM bearer token using a comparator that did not run in constant ti…
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Medium 4.3
IP address leak via image proxy bypass in Zulip Server
Zulip is an open-source team collaboration tool with topic-based threading that combines email and chat. When displaying messages with embedded remote images, Zulip normally loads the image preview via a go-camo proxy server. However, an attacker who can send…
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High 8.0
Crafted link in Zulip message can cause disclosure of credentials
Zulip is an open source team chat and Zulip Mobile is an app for iOS and Andriod users. In Zulip Mobile through version 27.189, a crafted link in a message sent by an authenticated user could lead to credential disclosure if a user follows the link. A patch w…
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Medium 5.4
Zulip Server insufficient authorization for changing bot roles
Zulip is an open source team chat tool. Due to an incorrect authorization check in Zulip Server 5.4 and earlier, a member of an organization could craft an API call that grants organization administrator privileges to one of their bots. The vulnerability is f…
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Medium 4.9
Zulip Server public data export contains attachments that are non-public
Zulip is an open-source team collaboration tool. Zulip Server versions 2.1.0 above have a user interface tool, accessible only to server owners and server administrators, which provides a way to download a "public data" export. While this export is only acces…
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Low 2.0
Expression Always True vulnerability in Zulip Server
Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were…
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Medium 5.4
Race condition in Zulip
Zulip is an open source group chat application. Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow conti…
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Medium 4.6
Cross-site scripting vulnerability in Zulip Server
Zulip is an open source team chat app. The `main` development branch of Zulip Server from June 2021 and later is vulnerable to a cross-site scripting vulnerability on the recent topics page. An attacker could maliciously craft a full name for their account an…
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Medium 4.1
Improper Access Control in zulip/zulip
Improper Access Control in GitHub repository zulip/zulip prior to 4.10.
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High 7.2
Multi-use invitations can grant access to other organizations in Zulip
Zulip is an open-source team collaboration tool with topic-based threading. Zulip Server version 2.0.0 and above are vulnerable to insufficient access control with multi-use invitations. A Zulip Server deployment which hosts multiple organizations is vulnerab…
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High 8.6CVE-2021-43799 Public exploit
RabbitMQ exposes ports with weak default secrets in Zulip Server
Zulip is an open-source team collaboration tool. Zulip Server installs RabbitMQ for internal message passing. In versions of Zulip Server prior to 4.9, the initial installation (until first reboot, or restart of RabbitMQ) does not successfully limit the defau…
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Medium 6.8
Cross-site Scripting (XSS) - Stored in zulip/zulip
Cross-site Scripting (XSS) - Stored in GitHub repository zulip/zulip more than and including 44f935695d452cc3fb16845a0c6af710438b153d and prior to 3eb2791c3e9695f7d37ffe84e0c2184fae665cb6.
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Medium 6.5
Ineffective expiration validation for invitation links in Zulip
Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registra…
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Medium 4.3
Regular expression denial-of-service in Zulip
Zulip is an open source team chat server. In affected versions Zulip allows organization administrators on a server to configure "linkifiers" that automatically create links from messages that users send, detected via arbitrary regular expressions. Malicious …