Discourse is an open-source messaging platform. In versions 3.0.1 and prior on the stable branch and versions 3.1.0.beta2 and prior on the beta and tests-passed branches, the count of personal messages displayed for a tag is a count of all personal messages regardless of whether the personal message is visible to a given user. As a result, any users can technically poll a sensitive tag to determine if a new personal message is created even if the user does not have access to the personal message.
In the patched versions, the count of personal messages tagged with a given tag is hidden by default. To revert to the old behaviour of displaying the count of personal messages for a given tag, an admin may enable the display_personal_messages_tag_counts site setting.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-200"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23935.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "stable <= 3.0.1"
},
{
"last_affected": "stable <= 3.0.1"
},
{
"introduced": "beta <= 3.1.0.beta2"
},
{
"last_affected": "beta <= 3.1.0.beta2"
},
{
"introduced": "tests-passed <= 3.1.0.beta2"
},
{
"last_affected": "tests-passed <= 3.1.0.beta2"
}
],
"source": "AFFECTED_FIELD"
}
]
}