OpenClaw versions prior to 2026.2.21 BlueBubbles webhook handler contains a passwordless fallback authentication path that allows unauthenticated webhook events in certain reverse-proxy or local routing configurations. Attackers can bypass webhook authentication by exploiting the loopback/proxy heuristics to send unauthenticated webhook events to the BlueBubbles plugin.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openclaw Openclaw
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
|
— |
2026.2.21
|
References 4
https://github.com/openclaw/openclaw/commit/283029bdea23164ab7482b320cb420d1b90…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/commit/6b2f2811dc623e5faaf2f76afaa92796371…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-5mx2-2mgw-x8rm
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-unauthenticated-webhook-access-vi…
disclosure@vulncheck.com