CVE-2018-15891

An issue was discovered in FreePBX core before 3.0.122.43, 14.0.18.34, and 5.0.1beta4. By crafting a request for adding Asterisk modules, an attacker is able to store JavaScript commands in a module name.

Published: 2019-06-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-15891 is rated Low Risk (39/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.35%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-15891

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-13 0.35% 0.35% -0.01%
2 2025-03-17 0.05% 0.35% +0.30%
3 2023-03-07 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-15891

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2018-15891

Affected software / configurations for CVE-2018-15891

Vendor Product Version Raw CPE
freepbx freepbx 15.0.1 cpe:2.3:a:freepbx:freepbx:15.0.1:-:*:*:*:*:*:*
sangoma freepbx < 13.0.122.43 cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*
sangoma freepbx >= 14.0.0, < 14.0.18.34 cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*
sangoma freepbx >= 15.0.0, <= 15.0.1 cpe:2.3:a:sangoma:freepbx:*:*:*:*:*:*:*:*
sangoma freepbx 15.0.1 cpe:2.3:a:sangoma:freepbx:15.0.1:beta4:*:*:*:*:*:*

References for CVE-2018-15891

cvelogic Threat Intelligence