CWE-79 (在Web页面生成时对输入的转义处理不恰当(跨站脚本)) — Vulnerability Class 23922

23922 vulnerabilities classified as CWE-79 (在Web页面生成时对输入的转义处理不恰当(跨站脚本)). AI Chinese analysis included.

CWE-79 represents a critical input validation weakness where software fails to properly sanitize user-supplied data before rendering it in web pages. Attackers typically exploit this vulnerability by injecting malicious scripts, often JavaScript, into trusted websites. When other users view the compromised page, the embedded code executes in their browsers, allowing the attacker to steal session cookies, hijack accounts, or redirect victims to phishing sites. This breach of trust undermines user privacy and application integrity. To prevent such attacks, developers must implement robust input validation and output encoding strategies. By strictly filtering incoming data and ensuring that all dynamic content is properly escaped before being processed by the browser, developers can neutralize dangerous inputs and effectively mitigate the risk of cross-site scripting vulnerabilities.

MITRE CWE Description

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. There are many variants of cross-site scripting, characterized by a variety of terms or involving different attack topologies. However, they all indicate the same fundamental weakness: improper neutralization of dangerous input between the adversary and a victim.

Common Consequences (3)

Access Control, Confidentiality Bypass Protection Mechanism, Read Application Data

The most common attack performed with cross-site scripting involves the disclosure of private information stored in user cookies, such as session information. Typically, a malicious user will craft a client-side script, which -- when parsed by a web browser -- performs some activity on behalf of the…

Integrity, Confidentiality, Availability Execute Unauthorized Code or Commands

In some circumstances it may be possible to run arbitrary code on a victim's computer when cross-site scripting is combined with other flaws, for example, "drive-by hacking."

Confidentiality, Integrity, Availability, Access Control Execute Unauthorized Code or Commands, Bypass Protection Mechanism, Read Application Data

The consequence of an XSS attack is the same regardless of whether it is stored or reflected. The difference is in how the payload arrives at the server. XSS can cause a variety of problems for the end user that range in severity from an annoyance to complete account compromise. Some cross-site scri…

Mitigations (5)

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.

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 e…

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 throug…

Effectiveness: Limited

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.

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.

Examples (2)

The following code displays a welcome message on a web page based on the HTTP GET username parameter (covers a Reflected XSS (Type 1) scenario).

$username = $_GET['username']; echo '<div class="header"> Welcome, ' . $username . '</div>';

Bad · PHP

http://trustedSite.example.com/welcome.php?username=<Script Language="Javascript">alert("You've been attacked!");</Script>

Attack

The following code displays a Reflected XSS (Type 1) scenario.

<% String eid = request.getParameter("eid"); %> ... Employee ID: <%= eid %>

Bad · JSP

<% protected System.Web.UI.WebControls.TextBox Login; protected System.Web.UI.WebControls.Label EmployeeID; ... EmployeeID.Text = Login.Text; %> <p><asp:label id="EmployeeID" runat="server" /></p>

Bad · ASP.NET

CVE ID	Title	CVSS	Severity	Published
CVE-2024-8657	Garden Gnome Package <= 2.2.9 - Authenticated (Contributor+) Stored Cross-Site Scripting — Garden Gnome Package	6.4	Medium	2024-09-24
CVE-2024-8716	XT Ajax Add To Cart for WooCommerce <= 1.1.2 - Reflected Cross-Site Scripting — XT Ajax Add To Cart for WooCommerce	6.1	Medium	2024-09-24
CVE-2024-8770	GitHub Enterprise Server 安全漏洞 — GitHub Enterprise Server	6.1^AI	Medium ^AI	2024-09-23
CVE-2024-47069	Oveleon Cookiebar reflected Cross-site Scripting vulnerability — contao-cookiebar	6.1	Medium	2024-09-23
CVE-2024-47068	DOM Clobbering Gadget found in rollup bundled scripts that leads to XSS — rollup	6.1	Medium	2024-09-23
CVE-2024-7835	Reflected XSS in Exnet Informatics Software's Ferry Reservation System — Ferry Reservation System	6.1^AI	Medium ^AI	2024-09-23
CVE-2024-9092	SourceCodester Profile Registration without Reload Refresh Registration Form add.php cross site scripting — Profile Registration without Reload Refresh	3.5	Low	2024-09-23
CVE-2024-9089	SourceCodester Modern Loan Management System update_loan_record.php cross site scripting — Modern Loan Management System	3.5	Low	2024-09-22
CVE-2024-9084	code-projects Blood Bank System bbms.php cross site scripting — Blood Bank System	3.5	Low	2024-09-22
CVE-2024-9083	SourceCodester Employee Management System add-admin.php cross site scripting — Employee Management System	2.4	Low	2024-09-22
CVE-2024-9077	dingfangzu Order Checkout order.js cross site scripting — dingfangzu	3.5	Low	2024-09-22
CVE-2024-9075	Stirling-Tools Stirling-PDF Markdown-to-PDF cross site scripting — Stirling-PDF	2.6	Low	2024-09-21
CVE-2024-9048	y_project RuoYi Backend User Import SysUserServiceImpl.java SysUserServiceImpl cross site scripting — RuoYi	3.1	Low	2024-09-21
CVE-2024-45793	Cross-site Scripting from in Confidant API call — confidant	4.8	Medium	2024-09-20
CVE-2024-47061	Arbitrary DOM attributes in element.attributes and leaf.attributes in Platejs — plate	8.3	High	2024-09-20
CVE-2024-42346	Stored Cross Site Scripting (Stored XSS) in Galaxy — galaxy	7.6	High	2024-09-20
CVE-2024-9033	SourceCodester Best House Rental Management System ajax.php cross site scripting — Best House Rental Management System	3.5	Low	2024-09-20
CVE-2024-9031	CodeCanyon CRMGo SaaS show cross site scripting — CRMGo SaaS	3.5	Low	2024-09-20
CVE-2024-9030	CodeCanyon CRMGo SaaS note cross site scripting — CRMGo SaaS	3.5	Low	2024-09-20
CVE-2024-9007	jeanmarc77 123solar detailed.php cross site scripting — 123solar	3.5	Low	2024-09-19
CVE-2024-38221	Microsoft Edge (Chromium-based) Spoofing Vulnerability — Microsoft Edge (Chromium-based)	4.3	Medium	2024-09-19
CVE-2024-8653	Netcat CMS: multiple reflected cross-site scripting vulnerabilities in netshop module — NetCat CMS	6.1^AI	Medium ^AI	2024-09-19
CVE-2024-8652	Netcat CMS: reflected cross-site scripting in openstat module — NetCat CMS	6.1^AI	Medium ^AI	2024-09-19
CVE-2024-7737	Stored Cross-site Scripting (XSS) vulnerability affecting 3DSwym in 3DSwymer from Release 3DEXPERIENCE R2022x through Release 3DEXPERIENCE R2024x — 3DSwymer	8.7	High	2024-09-19
CVE-2024-7736	Reflected Cross-site Scripting (XSS) vulnerability affecting ENOVIA Collaborative Industry Innovator from Release 3DEXPERIENCE R2022x through Release 3DEXPERIENCE R2024x — ENOVIA Collaborative Industry Innovator	8.7	High	2024-09-19
CVE-2024-7785	Reflected XSS in Ece Software's Electronic Ticket System — Electronic Ticket System	6.1^AI	Medium ^AI	2024-09-19
CVE-2024-8364	WP Custom Fields Search <= 1.2.35 - Authenticated (Contributor+) Stored Cross-Site Scripting via wpcfs-preset Shortcode — WP Custom Fields Search	6.4	Medium	2024-09-19
CVE-2024-8850	MC4WP: Mailchimp for WordPress 4.9.9 - 4.9.16 - Reflected Cross-Site Scripting — MC4WP: Mailchimp for WordPress	6.1	Medium	2024-09-19
CVE-2021-27917	XSS in contact tracking and page hits report — Mautic	7.3	High	2024-09-18
CVE-2024-47050	XSS in contact/company tracking (no authentication) — Mautic	5.4	Medium	2024-09-18

Vulnerabilities classified as CWE-79 (在Web页面生成时对输入的转义处理不恰当(跨站脚本)) represent 23922 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.