Vulnerability Details : CVE-2021-27770
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.
Products affected by CVE-2021-27770
- cpe:2.3:a:hcltech:sametime:11.6:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27770
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27770
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST | |
6.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L |
2.1
|
4.7
|
HCL Software |
CWE ids for CVE-2021-27770
-
The web application does not sufficiently verify inputs that are assumed to be immutable but are actually externally controllable, such as hidden form fields.Assigned by: psirt@hcl.com (Secondary)
-
The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27770
-
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430
Security Bulletin: Multiple security fixes available for HCL Sametime Proxy and Web chat clientVendor Advisory
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