Discourse: Private Chat Threat Message Disclosure via Chat Onebox Channel/Threat ID Mismatch
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| discourse | discourse | affected |
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No data.
No data.
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| Discourse | Discourse |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.625% probability within 30 days)
| Type | Values Removed | Values Added |
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| First Time appeared |
Discourse
Discourse discourse |
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| Vendors & Products |
Discourse
Discourse discourse |
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| Metrics |
ssvc
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| Description | Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, plugins/chat/lib/chat/onebox_handler.rb resolves Chat::Thread by route thread_id independently of the route channel_id before checking whether the user can preview the selected chat channel. An authenticated user can pair a public channel ID with a private thread ID in a /onebox.json request and obtain private thread message content. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0. | |
| Title | Discourse: Private Chat Threat Message Disclosure via Chat Onebox Channel/Threat ID Mismatch | |
| Weaknesses | CWE-639 | |
| References |
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| Metrics |
cvssV3_1
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