Vulnerability · Published Oct 20, 2026 · Assigned by VulDB

CVE-2026-113383Optimal IdM OptimalCloud Login cross site scripting

Medium 4.3

In plain English

A medium-severity cross-site scripting in OptimalCloud from Optimal IdM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 73.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Optimal IdM	OptimalCloud	5.0

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C

References

VDB-422656 | Optimal IdM OptimalCloud Login cross site scripting vdb-entry, technical-description
VDB-422656 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-113383 | CVE Analysis and Report third-party-advisory
Submit #991713 | Optimal IdM The OptimalCloud v5.0 Cross Site Scripting third-party-advisory