Cross-site scripting in Optimal IdM OptimalCloud login page
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting, Code execution
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79 and CWE-94.
Summary
Optimal IdM OptimalCloud from 5.0 contains a cross-site scripting flaw (CWE-79) on its public Login page. The page does not neutralize input in the tz argument, so manipulating that argument injects script into the page. A remote, unauthenticated attacker needs a victim to interact with the page, and the impact is limited to integrity.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
A vulnerability was detected in Optimal IdM OptimalCloud 5.0. This affects an unknown part of the file /v5.0/webapps/pages/public/Login. Performing a manipulation of the argument tz results in cross site scripting. Remote exploitation of the attack is possible. The vendor was contacted early about this disclosure but did not respond in any way.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Optimal IdM | OptimalCloud | 5.0 | — | No fix listed | CNA |
- OptimalCloud VendorOptimal IdM Affected 5.0 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:optimal_idm:optimalcloud:*:*:*:*:*:*:*:* | — | — | Optimal IdM |
- cpe:2.3:a:optimal_idm:optimalcloud:*:*:*:*:*:*:*:* Versions — — ·Optimal IdM
Remediation
The sources list no fixed version for OptimalCloud.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-20 Threatist record created from CVE-2026-113383
- 2026-10-20 Alias added: GHSA-w5c9-8gc4-7q4x
- 2026-10-20 CISA SSVC decision points changed
References
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More Optimal IdM vulnerabilities
- TI-2026-76811 Open redirect in Optimal IdM OptimalCloud social endpoint CVSS 4.0MEDIUM 5.3
Sources
- CVE-2026-113383 · CVE Program
- CVE-2026-113383 · NVD
- FIRST EPSS
- GHSA-w5c9-8gc4-7q4x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences