What is CVE-2019-4743?

CVE-2019-4743 is a medium-severity vulnerability in IBM Financial Transaction Manager, classified under Cleartext Transmission of Sensitive Information. CVSS score: 4.3/10. Published 2019-12-20.

How severe is CVE-2019-4743?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in IBM Financial Transaction Manager

CVE-2019-4743

IBM Financial Transaction Manager 3.0 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. The cookie will be sent to the insecure link and the attacker can then obtain the cookie value by snooping the traffic. IBM X-Force ID: 172880.

Published 2019-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

IBM Financial Transaction Manager — versions 3.0
IBM Financial Transaction Manager For Multiplatform — versions 3.0.0.0

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

www.ibm.com/support/pages/node/1135173 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/172880 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2019-4743?: CVE-2019-4743 is a medium-severity vulnerability in IBM Financial Transaction Manager, classified under Cleartext Transmission of Sensitive Information. CVSS score: 4.3/10. Published 2019-12-20.
How severe is CVE-2019-4743?: Medium severity. CVSS v3 base score is 4.3 out of 10.