CVE-2021-21490 Cross-site scripting in SAP NetWeaver AS for ABAP (Web Survey)

Medium 6.1 Published 9 Jun 2021 Updated 3 Aug 2024

Reflected XSS in SAP NetWeaver Web Survey allows attackers to steal session data and impersonate users to access sensitive information.

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-2021-21490?

CVE-2021-21490 is a medium-severity cross-site scripting vulnerability in Sap Netweaver Application Server Abap, published on 9 Jun 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 AS for ABAP (Web Survey), versions - 700, 702, 710, 711, 730, 731, 750, 750, 752, 75A, 75F, does not sufficiently encode input and output parameters which results in reflected cross site scripting vulnerability, through which a malicious user can access data relating to the current session and use it to impersonate a user and access all information with the same rights as the target user.

Weakness: CWE-79

Which versions are affected by CVE-2021-21490?

It affects 1 product.

Products include Sap Netweaver Application Server Abap.

How do I fix CVE-2021-21490?

No fix has been published for CVE-2021-21490 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-2021-21490 being exploited?

There is no known exploitation of CVE-2021-21490 in the wild and no public exploit code.

All Sap Netweaver Application Server Abap vulnerabilities

Sources

Also known as GHSA-c8cw-5vg3-hjw3.