CVE-2021-42655
SQL injection in SiteServer CMS
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
CVE-2021-42655- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-89
- Updated
- 2026-11-02
CVE List No score
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
CVE-2021-42655- Updated
- 2026-11-02
EUVDEUVD-2022-2681 No score
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
EUVD-2022-2681- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5xr5-v2h7-2w7w
SQL injection in SiteServer CMS
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
GHSA-5xr5-v2h7-2w7w- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
OSV
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
CVE-2021-42655- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-5xr5-v2h7-2w7w
SQL injection in SiteServer CMS
SiteServer CMS V6.15.51 is affected by a SQL injection vulnerability.
- Record
GHSA-5xr5-v2h7-2w7w- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-89
- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42655 is a high vulnerability (CVSS 8.8) in Sscms Siteserver Cms, published May 24, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.22%, the 68th percentile. No source names a fixed version.