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CVE-2018-5781

28
FAUCET Score

CVE-2018-5781 is a critical PHP code injection vulnerability affecting Mitel Connect ONSITE (R1711-PREM and earlier) and Mitel ST 14.2 (GA28 and earlier). An unauthenticated attacker can exploit this by sending specially crafted requests to the vendrecording.php page, leading to arbitrary PHP code execution within the application's context. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no user interaction, posing a high risk to confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the high severity warrants immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
<= r1711-premCPE matchmatch criteria
cpe:2.3:a:mitel:connect_onsite:*:*:*:*:*:*:*:*
<= ga28CPE matchmatch criteria
cpe:2.3:a:mitel:st14.2:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.76%
Probability of exploitation in next 30 days
EPSS Percentile
75.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0176 is in the 64th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

mitel.com / support/security-advisories/mitel-product-security-advisory-18-0004