CVE-2020-4640

Name: CVE-2020-4640
Creator: NVD / NIST
Published: 2021-02-04T17:15:13.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.1/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2020-4640 is a medium-severity vulnerability rated 4.1/10 on the CVSS scale. Certain IBM API Connect 10.0.0.0 through 10.0.1.0 and 2018.4.1.0 through 2018.4.1.13 configurations can result in sensitive information in the URL fragment identifiers. This information can be cached in the intermediate nodes like proxy servers, cdn, logging platforms, etc. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

Certain IBM API Connect 10.0.0.0 through 10.0.1.0 and 2018.4.1.0 through 2018.4.1.13 configurations can result in sensitive information in the URL fragment identifiers. This information can be cached in the intermediate nodes like proxy servers, cdn, logging platforms, etc. An attacker can make use of this information to perform attacks by impersonating a user. IBM X-Force ID: 185510.

Metrics

CVSS 3.1

4.1/10

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

EPSS Probability

0.35%

26.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Ibm	Api Connect	>= 2018.4.1.0, <= 2018.4.1.13
Ibm	Api Connect	10.0.0.0
Ibm	Api Connect	10.0.1.0

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/185510VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6410486Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/185510VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6410486Vendor Advisory

Timeline

Published: Feb 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4640?

How severe is CVE-2020-4640?

CVE-2020-4640 has a CVSS score of 4.1/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4640?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4640?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST