CVE-2021-21491 Open redirect in SAP NetWeaver Application Server Java (Applications based on Web Dynpro Java)

What is CVE-2021-21491?

CVE-2021-21491 is a medium-severity vulnerability in Sap Netweaver Application Server Java, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-601

Which versions are affected by CVE-2021-21491?

It affects 1 product.

Products include Sap Netweaver Application Server Java.

How do I fix CVE-2021-21491?

No fix has been published for CVE-2021-21491 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-21491 being exploited?

There is no known exploitation of CVE-2021-21491 in the wild and no public exploit code.

Other vulnerabilities in Sap Netweaver Application Server Java

• CVE-2020-6287 SAP NetWeaver Missing Authentication for Critical Function Exploited Critical 10.0
• CVE-2010-5326 SAP NetWeaver Remote Code Execution Exploited Critical 10.0
• CVE-2016-2386 SAP NetWeaver SQL Injection Exploited Critical 9.8
• CVE-2017-12637 SAP NetWeaver Directory Traversal Exploited High 7.5
• CVE-2016-3976 SAP NetWeaver Directory Traversal Exploited High 7.5

All Sap Netweaver Application Server Java vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-5hw2-3847-332f.