Zulip exports can leak private data
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| zulip | zulip | affected |
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No data.
| Vendor | Product | Versions |
|---|---|---|
| Zulip | Zulip | — |
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-8854 | 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 integrations or HTTP libraries (E.g., ZulipGitlabWebhook, okhttp, or PycURL) that have been used to access any organization on the server was incorrectly included in all three export types, regardless of if they were used to access the exported organization or not. The "public data" and "with consent" exports metadata including the titles of some topics in private channels which the administrator otherwise did not have access to, and none of the users consented to exporting and metadata for which users were in a group DM together. This vulnerability is fixed in 10.0. |
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.305% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Zulip zulip Server
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| CPEs | cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Zulip zulip Server
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| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* | |
| Metrics |
cvssV3_1
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| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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 integrations or HTTP libraries (E.g., ZulipGitlabWebhook, okhttp, or PycURL) that have been used to access any organization on the server was incorrectly included in all three export types, regardless of if they were used to access the exported organization or not. The "public data" and "with consent" exports metadata including the titles of some topics in private channels which the administrator otherwise did not have access to, and none of the users consented to exporting and metadata for which users were in a group DM together. This vulnerability is fixed in 10.0. | |
| Title | Zulip exports can leak private data | |
| Weaknesses | CWE-497 | |
| References |
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| Metrics |
cvssV4_0
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