Security readout for executives and security teams
Plain-English summary
HCL Sametime web clients may keep sensitive session cookie values persistent. If someone can access a user’s device after the user closes the session, those cookies may still be valid. The main business risk is unauthorized access to Sametime content, but the published score rates this low because exploitation requires physical access and user interaction.
Executive priority
Treat this as a low-severity but privacy-relevant session management issue. It is not a broad remote compromise based on the supplied evidence, but organizations using affected Sametime versions should remediate according to HCL guidance, especially where shared or physically accessible endpoints exist.
Technical view
CVE-2023-45718 is a CWE-613 session expiration weakness in HCL Sametime. Sensitive cookie values are set persistently in Sametime Web clients and may remain valid after the user closes the session. Affected versions listed are 11.5, 11.6, 11.6 IF1, 12.0, 12.0 FP1, 12.0.1, and 12.0.1 FP1.
Likely exposure
Exposure is limited to organizations using affected HCL Sametime Web client versions. The CVSS vector indicates local physical access, high attack complexity, low privileges, and required user interaction, so shared workstations, kiosks, unmanaged endpoints, or poor session hygiene are the most relevant scenarios.
Exploitation context
The provided sources do not report active exploitation, and CISA KEV status is false. The published vector suggests opportunistic abuse is constrained because an attacker needs physical access and user interaction. The highest concern is post-session access on a device where valid persistent cookies remain available.
Researcher notes
Evidence is limited to the CVE record, CVE List entry, and HCL advisory reference. No exploit code, active exploitation, or detailed fix text is included in the supplied bundle. The assessment relies on the published CVSS vector and affected version list.
Mitigation direction
- Review HCL advisory KB0109082 for fixed versions or vendor-approved configuration guidance.
- Prioritize remediation for shared devices, kiosks, and unmanaged endpoints using Sametime Web clients.
- Enforce endpoint lock, logout, and browser data-clearing policies for shared systems.
- Inventory affected Sametime versions and plan updates according to HCL guidance.
Validation and detection
- Confirm whether deployed Sametime versions match the affected version list.
- Review Sametime Web session cookie persistence and expiration behavior in a controlled test environment.
- Check whether browser close or logout invalidates session state as expected.
- Verify shared-device controls prevent reuse of previous user sessions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-613: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-45718 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N0.33.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.9LowVector: CVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0109082CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Session Expiration
Insufficient Session Expiration represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.