CVE-2020-4840

Name: CVE-2020-4840
Creator: NVD / NIST
Published: 2020-12-21T18:15:16.103+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2020-4840 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. IBM Security Secret Server 10.6 could allow a remote attacker to conduct phishing attacks, using an open redirect attack. By persuading a victim to visit a specially crafted Web site, a remote attacker could exploit this vulnerability to spoof the URL displayed to redirect a user to a malicious Web site that would appear to be trusted. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

IBM Security Secret Server 10.6 could allow a remote attacker to conduct phishing attacks, using an open redirect attack. By persuading a victim to visit a specially crafted Web site, a remote attacker could exploit this vulnerability to spoof the URL displayed to redirect a user to a malicious Web site that would appear to be trusted. This could allow the attacker to obtain highly sensitive information or conduct further attacks against the victim. IBM X-Force ID: 190044.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.90%

55.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Ibm	Security Secret Server	10.6

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/190044VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6336251Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/190044VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6336251Patch, Vendor Advisory

Timeline

Published: Dec 21, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4840?

How severe is CVE-2020-4840?

CVE-2020-4840 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4840?

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-2020-4840?

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

Scan your code now

Source: NVD / NIST