HCL Notes 11.0 - 11.0.1 FP4 Sametime Embedded chat clients are vulnerable to group chats loading script on restart
Priority LOW 26CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
An issue was discovered in the Sametime chat feature in the Notes 11.0 - 11.0.1 FP4 clients. An authenticated Sametime chat user could cause Remote Code Execution on another chat client by sending a specially formatted message through chat containing Javascript code.
Why it matters now
EPSS 0.00727 54th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| HCL Software | HCL Notes | 11.0 - 11.0.1 FP4 | — | No fix listed | CNA |
- HCL Notes VendorHCL Software Affected 11.0 - 11.0.1 FP4 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hcltech:hcl_inotes:11.0.0:*:*:*:*:*:*:* | 11.0.0 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:hcl_inotes:11.0.1:-:*:*:*:*:*:* | 11.0.1 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack1:*:*:*:*:*:* | 11.0.1 fixpack1 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack2:*:*:*:*:*:* | 11.0.1 fixpack2 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack3:*:*:*:*:*:* | 11.0.1 fixpack3 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack4:*:*:*:*:*:* | 11.0.1 fixpack4 | Vulnerable | HCL Software |
- cpe:2.3:a:hcltech:hcl_inotes:11.0.0:*:*:*:*:*:*:* Versions 11.0.0 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:hcl_inotes:11.0.1:-:*:*:*:*:*:* Versions 11.0.1 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack1:*:*:*:*:*:* Versions 11.0.1 fixpack1 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack2:*:*:*:*:*:* Versions 11.0.1 fixpack2 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack3:*:*:*:*:*:* Versions 11.0.1 fixpack3 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:hcl_inotes:11.0.1:fixpack4:*:*:*:*:*:* Versions 11.0.1 fixpack4 Vulnerable ·HCL Software
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27760
- 2026-10-03 Alias added: GHSA-xcf3-q63w-pqpj
References
More HCL Software Hcl Inotes vulnerabilities
- TI-2022-10549 Cross-site scripting in HCL iNotes CVSS 3.1HIGH 8.3
- TI-2022-10554 HCL iNotes is susceptible to a Broken Password Strength Checks vulnerability. CVSS 3.1HIGH 7.5
- TI-2022-10550 Open redirect in HCL iNotes CVSS 3.1HIGH 7.4
- TI-2020-11140 HCL iNotes is susceptible to a Tabnabbing vulnerability caused by improper sanitization… CVSS 3.1MEDIUM 6.5
- TI-2020-11159 Cross-site scripting in HCL iNotes CVSS 3.1MEDIUM 6.1
- TI-2020-03576 HCL iNotes is susceptible to a sensitive cookie exposure vulnerability. CVSS 3.1MEDIUM 5.9
Sources
- CVE-2021-27760 · CVE Program
- CVE-2021-27760 · NVD
- FIRST EPSS
- GHSA-xcf3-q63w-pqpj · GitHub Advisory Database · CC BY 4.0
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