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CVE-2023-26218: TIBCO Nimbus Reflected Cross-site Scripting (XSS) vulnerabilities

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-09-29 · updated 2026-06-17
• Weakness: CWE-79

Description

The Web Client component of TIBCO Software Inc.'s TIBCO Nimbus contains easily exploitable Reflected Cross Site Scripting (XSS) vulnerabilities that allow a low privileged attacker to social engineer a legitimate user with network access to execute scripts targeting the affected system or the victim's local system. A successful attack using this vulnerability requires human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO Nimbus: versions 10.6.0 and below.

Affected products

• TIBCO Software Inc. TIBCO Nimbus: before 10.6.1 — fixed in 10.6.1

How to fix

Upgrade to a fixed version: TIBCO Software Inc. TIBCO Nimbus 10.6.1. Check the vendor advisory for mitigations.

References

• https://www.tibco.com/services/support/advisories
• https://www.tibco.com/services/support/advisories

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