CVE-2019-16977
In FusionPBX up to 4.5.7, the file app\extensions\extension_imports.php uses an unsanitized "query_string" variable coming from the URL, which is reflected in HTML, leading to XSS.
Does this matter?
Lower severity and a low EPSS score (0.66%). Track it; it rarely justifies an emergency change on its own.
Description
In FusionPBX up to 4.5.7, the file app\extensions\extension_imports.php uses an unsanitized "query_string" variable coming from the URL, which is reflected in HTML, leading to XSS.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.66% probability · 51th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- fusionpbx/fusionpbx
- Source
- cve@mitre.org
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/fusionpbx/fusionpbx/commit/fc8e4e2d278ce6bffff21b04248d469a59eb8cd4Patch
- https://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-xss-10/Third Party Advisory
- https://github.com/fusionpbx/fusionpbx/commit/fc8e4e2d278ce6bffff21b04248d469a59eb8cd4Patch
- https://resp3ctblog.wordpress.com/2019/10/19/fusionpbx-xss-10/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.