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CVE-2021-27770 Details

Description

The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. We assume this service is used by the “meetings”-function where users can specify an external URL where the online meeting will take place.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430	CVE	Vendor Advisory
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Weakness Not in a Standard CWE Category	[email protected]
CWE-472	External Control of Assumed-Immutable Web Parameter	[email protected]

Affected Products

Product	Versions
hcltech sametime	11.6
CPE cpe:2.3:a:hcltech:sametime:11.6:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 30, 2023	Reanalysis	[email protected]
May 24, 2022	Initial Analysis	[email protected]