CVE-2021-33703 Cross-site scripting in SAP NetWeaver Enterprise Portal (Application Extensions)

High 8.3 Published 10 Aug 2021 Updated 3 Aug 2024

An attacker can execute arbitrary scripts in a victim's browser via a malicious link in SAP NetWeaver Enterprise Portal.

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

What is CVE-2021-33703?

CVE-2021-33703 is a high-severity cross-site scripting vulnerability in SAP NetWeaver Enterprise Portal (Application Extensions), published on 10 Aug 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

Under certain conditions, NetWeaver Enterprise Portal, versions - 7.30, 7.31, 7.40, 7.50, does not sufficiently encode URL parameters. An attacker can craft a malicious link and send it to a victim. A successful attack results in Reflected Cross-Site Scripting (XSS) vulnerability.

Weakness: CWE-79

Which versions are affected by CVE-2021-33703?

It affects 1 product.

Products include Sap Netweaver Enterprise Portal.

How do I fix CVE-2021-33703?

No fix has been published for CVE-2021-33703 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-2021-33703 being exploited?

There is no known exploitation of CVE-2021-33703 in the wild and no public exploit code.

Sources

Also known as GHSA-mc4p-q6wc-4cwx.