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Fencer Vulns
medium 6.3

CVE-2020-4555 json

IBM Financial Transaction Manager 3.0.6 and 3.1.0 does not invalidate session after logout which could allow an authenticated user to imper…

published 2020-12-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-25802

cvss
6.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

IBM Financial Transaction Manager 3.0.6 and 3.1.0 does not invalidate session after logout which could allow an authenticated user to impersonate another user on the system. IBM X-Force ID: 183328.

Patch / fix

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 6.3 CVSS:3.0/S:U/UI:N/AV:N/PR:L/AC:L/I:L/C:L/A:L/E:U/RL:O/RC:C
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CNA 3.0 6.3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 5.5 AV:N/AC:L/Au:S/C:P/I:P/A:N

Affected products

  • IBM Financial Transaction Manager

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.