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CVE-2021-27770
HCL Sametime is vulnerable to arbitrary HTTP requests
Medium6.8EPSS 0.74%
- Published
- Updated
- Reserved
- Assigned by
- HCL
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| HCLCNA (assigner) | 3.1 | Medium6.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.74% · top 46% of all CVEs (2 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
Affected products
HCL Software · Sametime
- affected 11.6
References (1)
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .