Discourse: Onebox iframe origin allowlist enforces URL authority boundary
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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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% (0.313% probability within 30 days)
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Discourse
Discourse discourse |
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Discourse
Discourse discourse |
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ssvc
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| Description | Discourse is an open-source discussion platform. Prior to 2026.1.7, an authenticated user could submit specially formed URLs that bypassed the Onebox allowlist and embedded malicious content in a site. This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1. | |
| Title | Discourse: Onebox iframe origin allowlist enforces URL authority boundary | |
| Weaknesses | CWE-20 | |
| References |
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| Metrics |
cvssV3_1
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