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Vulnerability record · CVE-2021-21491 · published 10 March 2021

CVE-2021-21491: Sap netweaver application server java open redirect vulnerability

Sap · Netweaver Application Server Java

SAP Netweaver Application Server Java (Applications based on WebDynpro Java) versions 7.00, 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allow an attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

6.1 CVSS 3.1 Medium EPSS 0.69% · top 49.0% CWE-601 · Open redirect
6.1CVSS 3.1 base score, v2 5.8
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

SAP Netweaver Application Server Java (Applications based on WebDynpro Java) versions 7.00, 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allow an attacker to redirect users to a malicious site due to Reverse Tabnabbing vulnerabilities.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://launchpad.support.sap.com/#/notes/2976947 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=571343107 Vendor Advisory
https://launchpad.support.sap.com/#/notes/2976947 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=571343107 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-21491), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.