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Description:
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts
Advisory GHSA-jq3g-xqpx-37x3 references a vulnerability in the following Go modules:
Description:
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts
References:
Cross references:
See doc/quickstart.md for instructions on how to triage this report.
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