CVE-2021-27770
HIGHCVSS 8.8/10EPSS 0.67%
Last modified
CVE-2021-27770 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The vulnerability was discovered within the “FaviconService”. The service takes a base64-encoded URL which is then requested by the webserver. EPSS estimates a 0.67% chance of exploitation in the next 30 days.
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hcltech | Sametime | 11.6 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-27770?
CVE-2021-27770 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27770?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-27770?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST