# CVE-2026-124575: SiteServer SSCMS Admin-Login CAPTCHA LoginController.Submit.cs LoginController.Submit excessive authentication

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

A vulnerability was identified in SiteServer SSCMS up to 7.1.3/7.2.1/7.4.0. This issue affects the function LoginController.Submit of the file src/SSCMS.Web/Controllers/Admin/LoginController.Submit.cs of the component Admin-Login CAPTCHA. Such manipulation of the argument isForceLogoutAndLogin leads to improper restriction of excessive authentication attempts. It is possible to launch the attack remotely. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The name of the patch is df3becb7ebb00a48435418a44fd08a459eb38ace. Applying a patch is advised to resolve this issue.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/siteserver/cms/pull/3905
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/siteserver/cms/commit/df3becb7ebb00a48435418a44fd08a459eb38ace

## Affected products and versions

- SiteServer / SSCMS: 7.0 (affected); 7.1 (affected); 7.1.0 (affected); 7.1.1 (affected); 7.1.2 (affected); 7.1.3 (affected); 7.2 (affected); 7.2.0 (affected); 7.2.1 (affected); 7.3 (affected); 7.4.0 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.3 (medium); CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X; source: CNA: VulDB

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 3.7 (low); CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 2.6 (low); AV:N/AC:H/Au:N/C:P/I:N/A:N/E:ND/RL:OF/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-307, CWE-799

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/432921 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/432921/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-124575 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1038068 (CNA: VulDB; third-party-advisory)

- https://github.com/siteserver/cms/blob/15144f30c6cc0e11d50985b6ab9236cfce8cacbd/src/SSCMS.Web/Controllers/Admin/LoginController.Submit.cs#L46 (CNA: VulDB; related)

- https://github.com/siteserver/cms/pull/3905 (CNA: VulDB; issue-tracking, patch)

- https://github.com/siteserver/cms/commit/df3becb7ebb00a48435418a44fd08a459eb38ace (CNA: VulDB; patch)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-124575; retrieved 2026-11-09; source updated 2026-11-09

Revision: a700db65b48fd83b8d31fc32ee84d444fa6711e1df85c26bbe8b38506cb132b1

Canonical: https://y2.dev/cve/CVE-2026-124575

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