Vulnerability · Published Sep 20, 2021 · Assigned by GitHub_M

CVE-2021-41082Private message title and participating users leaked in discourse

High 7.5

In plain English

A high-severity information exposure in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 78% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)1.8%top 21.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Discourse is a platform for community discussion. In affected versions any private message that includes a group had its title and participating user exposed to users that do not have access to the private messages. However, access control for the private messages was not compromised as users were not able to view the posts in the leaked private message despite seeing it in their inbox. The problematic commit was reverted around 32 minutes after it was made. Users are encouraged to upgrade to the latest commit if they are running Discourse against the `tests-passed` branch.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	>= tests-passed = ddb4583, < tests-passed = 27bad28

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/discourse/discourse/security/advisories/GHSA-vm3x-w6jm-j9vv x_refsource_CONFIRM
https://github.com/discourse/discourse/commit/27bad28c530c89acab35a56b945b6a3924280f4b x_refsource_MISC
https://github.com/discourse/discourse/commit/ddb458343dc39a7a8c99467dcd809b444514fe2c x_refsource_MISC