CVE-2023-45718: hcl software hcl sametime Session Fixation
CVSS: 7.5v3.1HighModified
Published 09-02-2024Last modified 03-06-2025
Vulnerability summary
CVE-2023-45718 is a high (CVSS 7.5) Session Fixation vulnerability in hcl software hcl sametime. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
0.35%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-02-2024PublishedVulnerability first disclosed.
- 03-06-2025Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSources2 sources · 3.9–7.5
- CVE.orgCNA3.9LowCVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
0.35%
Chance of exploitation in the next 30 days
Percentile
28%
Versus all other CVEs
30-day change
0.00 pp
From 0.35% on 18-09-2026
18-09-202618-10-2026
EPSS score0.35%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-384Session FixationAuthenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
- CWE-613Insufficient Session ExpirationAccording to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
Affected systems
Hcl software1 product
- hcl sametime11.5, 11.6, 11.6 IF1, 12.0, 12.0 FP1, 12.0.1, 12.0.1 FP1
Hcltech1 product
- sametime≥ 11.5, < 12.0.2
2 vendors · 2 products