Improper Handling of Extra Parameters in Etherpad - #VU151602
Published: September 22, 2026
Vulnerability identifier: #VU151602
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-235
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to inject unintended API parameters.
The vulnerability exists due to improper handling of extra parameters in /api/2 request-header processing when merging request headers into the API field set. A remote attacker can submit request headers as unintended API fields to inject unintended API parameters.
Affected software
Etherpad
Remediation
Install security update from vendor's website.
Etherpad - update to 3.3.0