CVE-2018-1638

IBM API Connect 5.0.0.0-5.0.8.3 Developer Portal does not enforce Two Factor Authentication (TFA)...

5.9 Medium

IBM API Connect 5.0.0.0-5.0.8.3 Developer Portal does not enforce Two Factor Authentication (TFA) while resetting a user password but enforces it for all other login scenarios. IBM X-Force ID: 144483.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

1.75%Down 3.0 points since Apr 14, 2021

What each source reports

CVE List Score used 5.9

Record: CVE-2018-1638
CVSS 3.0: 5.9 MediumCVSS:3.0/A:N/AC:H/AV:N/C:N/I:H/PR:N/S:U/UI:N/E:U/RC:C/RL:O
Updated: 2026-11-02

EUVDEUVD-2018-12217 5.9

Record: EUVD-2018-12217
CVSS 3.0: 5.9 MediumCVSS:3.0/A:N/AC:H/AV:N/C:N/I:H/PR:N/S:U/UI:N/E:U/RC:C/RL:O
Updated: 2026-11-03

GitHub AdvisoriesGHSA-cm63-5mv5-74rv 8.1

IBM API Connect 5.0.0.0-5.0.8.3 Developer Portal does not enforce Two Factor Authentication (TFA)...

Record: GHSA-cm63-5mv5-74rv
CVSS 3.0: 8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-287
Updated: 2026-11-02

NVD 5.9

Record: CVE-2018-1638
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 3.0: 8.1 HighCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-287
Updated: 2026-11-02

Affected products

ibm api connect

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-1638 is a medium vulnerability (CVSS 5.9) in Ibm Api Connect, published July 31, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.75%, the 77th percentile. No source names a fixed version.