What is CVE-2018-1791?

CVE-2018-1791 is a medium-severity vulnerability in IBM Connections, classified under Improper Input Validation. CVSS score: 4.9/10. Published 2018-09-14.

How severe is CVE-2018-1791?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Improper input validation in IBM Connections

CVE-2018-1791

IBM Connections 5.0, 5.5, and 6.0 is vulnerable to an External Service Interaction attack, caused by improper validation of a request property. By submitting suitable payloads, an attacker could exploit this vulnerability to induce the Connections server to attack other systems. IBM X-Force ID: 148946.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-09-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (60.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

IBM Connections — versions 5.5, 5.0, 6.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.ibm.com/support/docview.wss (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/148946 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2018-1791?: CVE-2018-1791 is a medium-severity vulnerability in IBM Connections, classified under Improper Input Validation. CVSS score: 4.9/10. Published 2018-09-14.
How severe is CVE-2018-1791?: Medium severity. CVSS v3 base score is 4.9 out of 10.