Netweaver Application Server Java Cross-site Scripting

Due to insufficient input validation, SAP NetWeaver AS Java (HTTP Provider Service) - version 7.50, allows an unauthenticated attacker to inject a script into a web request header. On successful exploitation, an attacker can view or modify information causing a limited impact on the confidentiality and integrity of the application. (2022-12-12, CVE-2022-41262)

SAP NetWeaver AS Java (Applications based on HTMLB for Java) allows a basic-level authorized attacker to store a malicious file on the server. When a victim tries to open this file, it results in a Cross-Site Scripting (XSS) vulnerability and the attacker can read and modify data. However, the attacker does not have control over kind or degree. (2021-04-13, CVE-2021-27601)

SAP NetWeaver Application Server Java, versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, and 7.50 allows an unauthenticated attacker to include JavaScript blocks in any web page or URL with different symbols which are otherwise not allowed. On successful exploitation an attacker can steal authentication information of the user, such as data relating to his or her current session and limitedly impact confidentiality and integrity of the application, leading to Reflected Cross Site Scripting. (2020-10-15, CVE-2020-6319)

SAP NetWeaver Application Server JAVA(XML Forms) versions 7.30, 7.31, 7.40, 7.50 does not sufficiently encode user controlled inputs, which allows an authenticated User with special roles to store malicious content, that when accessed by a victim, can perform malicious actions by executing JavaScript, leading to Stored Cross-Site Scripting. (2020-09-09, CVE-2020-6313)

SAML 1.1 SSO Demo Application in SAP NetWeaver Java Application Server (J2EE-APPS), versions 7.10 to 7.11, 7.20, 7.30, 7.31, 7.40 and 7.50, does not sufficiently encode user-controlled inputs, which results in cross-site scripting (XSS) vulnerability. (2019-03-12, CVE-2019-0275)

SAP NetWeaver AS Java Web Container service does not validate against whitelist the HTTP host header which can result in HTTP Host Header Manipulation or Cross-Site Scripting (XSS) vulnerability. This is fixed in versions 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50. (2018-12-11, CVE-2018-2504)

The logon application of SAP NetWeaver AS Java 7.10 to 7.11, 7.20, 7.30, 7.31, 7.40, 7.50 does not sufficiently encode user-controlled inputs, resulting in a cross-site scripting (XSS) vulnerability. (2018-09-11, CVE-2018-2452)

Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.

The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:

https://server.com/confirmation?message=Transaction+Complete

what results in:

<span>Confirmation: Transaction Complete</span>

In that case the message can be modified to become a valid Javascript code, e.g.:

https://server.com/confirmation?message=<script>dangerous javascript code here</script>

and it will be executed locally by the user's browser with full access to the user's personal application/browser data:

<span>Confirmation: <script>dangerous javascript code here</script></span>