Discourse: Forged AWS SNS bounce notifications can disable a targeted user's email (missing TopicArn binding)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Configuration 1 [-]
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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% (0.300% probability within 30 days)
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ssvc
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Discourse
Discourse discourse |
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Discourse
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| Description | Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the AWS SES bounce webhook at POST /webhooks/aws verified that SNS messages were signed by Amazon but did not bind them to trusted TopicArn values, allowing any AWS account holder to publish validly signed forged Bounce notifications that revoke a targeted user email. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5. | |
| Title | Discourse: Forged AWS SNS bounce notifications can disable a targeted user's email (missing TopicArn binding) | |
| Weaknesses | CWE-345 | |
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cvssV3_1
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