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Advisories

Issabel Framework Hard-coded JWT Key RCE via pbxapi/manager/originate

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severity
critical
date
Affecting

  • Issabel Framework < b97dbaf0b71c1c36f841e672b664afbeb02773bd

CWE
  • CWE-321 Use of Hard-coded Cryptographic Key
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
Credit
The Shadowserver Foundation
Description
The Issabel Framework, the web framework supporting Issabel PBX software, before commit b97dbaf contains a hard-coded HS256 JWT signing key in the pbxapi index.php file that is identical across every installation, allowing unauthenticated remote attackers to forge valid bearer tokens. Attackers can use the forged token to call the manager originate endpoint with the System application parameter, causing Asterisk to execute arbitrary OS commands as the Asterisk user. Exploitation evidence was first observed by the Shadowserver Foundation on 2026-09-09.

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