Vulnerability · Published Oct 30, 2023 · Assigned by GitHub_M

CVE-2023-42804BigBlueButton Path Traversal – Reading Certain File Extensions

Low 3.1

In plain English

A low-severity path traversal in bigbluebutton from bigbluebutton. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.6%top 53.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.

Affected products (as reported)

Vendor	Product	Versions
bigbluebutton	bigbluebutton	< 2.6.0-beta.1

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84 x_refsource_CONFIRM
https://github.com/bigbluebutton/bigbluebutton/pull/15960 x_refsource_MISC