CVE-2023-42804

LOW

BigBlueButton < 2.6.0-beta.1 - Unauthenticated Path Traversal via File Extension Validation Bypass

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/pull/15960

Scores

CVSS v3 3.1
EPSS 0.0046
EPSS Percentile 36.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (2)
bigbluebutton/bigbluebutton 2.6.0 alpha1 (4 CPE variants)
bigbluebutton/bigbluebutton < 2.5.18
Published Oct 30, 2023
Tracked Since Feb 18, 2026