HCL Sametime is impacted by a failure to invalidate sessions

published 2024-02-09 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-50007

cvss: 3.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits: 0; none known

Sametime is impacted by a failure to invalidate sessions. The application is setting sensitive cookie values in a persistent manner in Sametime Web clients. When this happens, cookie values can remain valid even after a user has closed out their session.

Patch / fix

fixed in 1

hcltech sametime 12.0.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-13)

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.9	CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

HCL Software HCL Sametime

Classification

Weakness

CWE-613 DEPRECATED: Insufficient Session Expiration
CWE-384 Session Fixation

References

support.hcltechsw.com /csm?id=kb_article&sysparm_article=KB0109082
vendor-advisory

Sources

CVE List CVE-2023-45718
NVD CVE-2023-45718

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.

Summary