CVE-2021-33665 Cross-site scripting in SAP NetWeaver Application Server ABAP (Applications based on SAP GUI for HTML)

Medium 5.4 Published 9 Jun 2021 Updated 3 Aug 2024

An attacker can execute arbitrary scripts in the context of other users via SAP GUI for HTML, potentially leading to session hijacking or data theft.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-33665?

CVE-2021-33665 is a medium-severity cross-site scripting vulnerability in Sap Netweaver Application Server Abap, published on 9 Jun 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

SAP NetWeaver Application Server ABAP (Applications based on SAP GUI for HTML), versions - KRNL64NUC - 7.49, KRNL64UC - 7.49,7.53, KERNEL - 7.49,7.53,7.77,7.81,7.84, does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.

Weakness: CWE-79

Which versions are affected by CVE-2021-33665?

It affects 1 product.

Products include Sap Netweaver Application Server Abap.

How do I fix CVE-2021-33665?

No fix has been published for CVE-2021-33665 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-33665 being exploited?

There is no known exploitation of CVE-2021-33665 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-v63x-mvcc-j8h6.