Weakness (CWE)
CWE-79: Cross-site Scripting
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
How to prevent it (8 mitigations)
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Architecture and Design
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
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Implementation, Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
- HTML body
- Element attributes (such as src="XYZ")
- URIs
- JavaScript sections
- Cascading Style Sheets and style property
etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
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Architecture and Design, Implementation
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
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Implementation
Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
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Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
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Implementation
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
Source: MITRE CWE-79
2,694 results · Clear filters · Feed
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Low —
Cross-site scripting in Apache ActiveMQ
Cross-site scripting (XSS) vulnerability in createDestination.action in Apache ActiveMQ before 5.3.1 allows remote authenticated users to inject arbitrary web script or HTML via the JMSDestination parameter in a queue action.
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Low —
TYPO3 Direct Mail Extension Vulnerable to Cross-Site Scripting (XSS)
Cross-site scripting (XSS) vulnerability in the newsletter configuration feature in the backend module in the Direct Mail (direct_mail) extension 2.6.4 and earlier for TYPO3 allows remote authenticated users to inject arbitrary web script or HTML via unspecif…
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Low —
TYPO3 Backend vulnerable to Cross-site Scripting
Multiple cross-site scripting (XSS) vulnerabilities in the Backend subcomponent in TYPO3 4.0.13 and earlier, 4.1.x before 4.1.13, 4.2.x before 4.2.10, and 4.3.x before 4.3beta2 allow remote authenticated users to inject arbitrary web script or HTML via unspec…
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Low —
typo3/cms-felogin Cross-site Scripting vulnerability
Cross-site scripting (XSS) vulnerability in the frontend plugin for the felogin system extension in TYPO3 4.2.0, 4.2.1 and 4.2.2 allows remote attackers to inject arbitrary web script or HTML via unknown vectors.
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Low —
Alkacon OpenCMS XSS via searchfilter parameter in system/workplace/admin/workplace/sessions.jsp
Cross-site scripting (XSS) vulnerability in system/workplace/admin/workplace/sessions.jsp in Alkacon OpenCMS 7.0.3 allows remote attackers to inject arbitrary web script or HTML via the searchfilter parameter, a different vector than CVE-2008-1510.
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Low —CVE-2008-1510 Public exploit
Alkacon OpenCMS XSS via searchfilter or listSearchFilter parameter
Cross-site scripting (XSS) vulnerability in system/workplace/admin/accounts/users_list.jsp in Alkacon OpenCMS 7.0.3 allows remote attackers to inject arbitrary web script or HTML via the (1) searchfilter or (2) listSearchFilter parameter.
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Low —CVE-2008-1300 Public exploit
Alkacon Open CMS XSS via Logfile Viewer Settings function
Cross-site scripting (XSS) vulnerability in the Logfile Viewer Settings function in system/workplace/admin/workplace/logfileview/logfileViewSettings.jsp in Alkacon OpenCms 7.0.3 and 7.0.4 allows remote attackers to inject arbitrary web script or HTML via the …
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Low —CVE-2008-1045 Public exploit
Alkacon OpenCMS XSS via file tree navigation in system/workplace/views/explorer/tree_files.jsp
Cross-site scripting (XSS) vulnerability in the file tree navigation function in system/workplace/views/explorer/tree_files.jsp in Alkacon OpenCMS 7.0.3 allows remote attackers to inject arbitrary web script or HTML via the resource parameter.
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Low —
Apache Tomcat vulnerable to Cross-site Scripting
Multiple cross-site scripting (XSS) vulnerabilities in the (1) Manager and (2) Host Manager web applications in Apache Tomcat 4.0.0 through 4.0.6, 4.1.0 through 4.1.36, 5.0.0 through 5.0.30, 5.5.0 through 5.5.24, and 6.0.0 through 6.0.13 allow remote authenti…
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Low —CVE-2007-1358 EPSS 20%
Apache Tomcat XSS In Accept-Language Headers
Cross-site scripting (XSS) vulnerability in certain applications using Apache Tomcat 4.0.0 through 4.0.6 and 4.1.0 through 4.1.34 allows remote attackers to inject arbitrary web script or HTML via crafted "Accept-Language headers that do not conform to RFC 26…
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Low —
Alkacon OpenCms XSS via unsanitized message body
Cross-site scripting (XSS) vulnerability in Alkacon OpenCms before 6.2.2 allows remote authenticated users to inject arbitrary web script or HTML via the message body.
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Low —
Alkacon OpenCms XSS via query parameter in a search action
Cross-site scripting (XSS) vulnerability in search.html in Alkacon OpenCms 6.0.0, 6.0.2, and 6.0.3 allows remote attackers to inject arbitrary web script or HTML via the query parameter in a search action.
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Low 3.7
Cross-site scripting in Apache Struts
Cross-site scripting (XSS) vulnerability in (1) LookupDispatchAction and possibly (2) DispatchAction and (3) ActionDispatcher in Apache Software Foundation (ASF) Struts before 1.2.9 allows remote attackers to inject arbitrary web script or HTML via the parame…
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Low —
Alkacon OpenCms XSS via username during login
Cross-site scripting (XSS) vulnerability in Alkacon OpenCms before 6.0.3 allows remote attackers to inject arbitrary web script or HTML via the username in the login page.