What’s Vulnerable › Vulnerabilities

CVE-2021-21476

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-09 · updated 2026-06-17
• Weakness: CWE-601

Description

SAP UI5 versions before 1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18, 1.84.5, 1.85.4, 1.86.1 allows an unauthenticated attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

Affected products

• SAP SE SAP UI5: before 1.38.49; from 1.50.5 before 1.52.49; from 1.60.1 before 1.60.34; from 1.71.0 before 1.71.31; from 1.78.0 before 1.78.18; from 1.84.0 before 1.84.5 — fixed in 1.38.49, 1.52.49, 1.60.34, 1.71.31, 1.78.18, 1.84.5

How to fix

Upgrade to a fixed version: SAP SE SAP UI5 1.38.49, 1.52.49, 1.60.34, 1.71.31. Check the vendor advisory for mitigations.

References

• https://launchpad.support.sap.com/#/notes/3014303
• https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=568460543
• https://launchpad.support.sap.com/#/notes/3014303
• https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=568460543

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