CVE-2021-45461 in the critical feed json
FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to exe…
published 2021-12-22 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32227
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 21.5%
- EPSS 21.5% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
FreePBX, when restapps (aka Rest Phone Apps) 15.0.19.87, 15.0.19.88, 16.0.18.40, or 16.0.18.41 is installed, allows remote attackers to execute arbitrary code, as exploited in the wild in December 2021. The fixed versions are 15.0.20 and 16.0.19.
Exploit prediction
21.49% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- community.freepbx.org https://community.freepbx.org/t/0-day-freepbx-exploit/80092 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
-
community.freepbx.org
/t/0-day-freepbx-exploit/80092
exploit, issue-tracking, vendor-advisory
-
community.freepbx.org
/t/security-issue-potential-rest-phone-apps-rce/80109
vendor-advisory
-
wiki.freepbx.org
/display/FOP/2021-12-21+SECURITY%3A+Potential+Rest+Phone+Apps+RCE
vendor-advisory
Sources
- CVE List CVE-2021-45461
- NVD CVE-2021-45461
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.