CVE-2023-47107: PILOS account takeover through password reset poisoning

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-11-08 · updated 2026-06-17
Weakness: CWE-20

Description

PILOS is an open source front-end for BigBlueButton servers with a built-in load balancer. The password reset component deployed within PILOS uses the hostname supplied within the request host header when building a password reset URL. It may be possible to manipulate the URL sent to PILOS users when so that it points to the attackers server thereby disclosing the password reset token if/when the link is followed. This only affects local user accounts and requires the password reset option to be enabled. This issue has been patched in version 2.3.0.

Affected products

THM-Health PILOS: from 2.0.0 before 2.3.0 — fixed in 2.3.0

How to fix

Upgrade to a fixed version: THM-Health PILOS 2.3.0. Check the vendor advisory for mitigations.

References

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