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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 23434

23434 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, ConfidentialityBypass 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, AvailabilityExecute 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 ControlExecute 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 DesignUse 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 DesignUnderstand 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, ImplementationUnderstand 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 DesignFor 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 DesignIf 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 IDTitleCVSSSeverityPublished
CVE-2025-8445 Countdown Timer for Elementor <= 1.3.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'countdown_label' — Countdown Timer for Elementor 6.4 Medium2025-09-11
CVE-2025-5801 Digital Events Calendar <= 1.0.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via column Parameter — Digital Events Calendar 6.4 Medium2025-09-11
CVE-2025-9850 Evenium <= 1.3.11 - Authenticated (Contributor+) Stored Cross-Site Scripting — Evenium 6.4 Medium2025-09-11
CVE-2025-8686 WP Easy FAQs <= 1.0.5 - Authenticated (Author+) Stored Cross-Site Scripting via WP_EASY_FAQ Shortcode — WP Easy FAQs 6.4 Medium2025-09-11
CVE-2025-9861 ThemeLoom Widgets <= 1.8.5 - Authenticated (Contributor+) Stored Cross-Site Scripting — ThemeLoom Widgets 6.4 Medium2025-09-11
CVE-2025-8316 Certifica WP <= 3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via evento Parameter — Certifica WP 6.4 Medium2025-09-11
CVE-2025-8721 Workable API <= 1.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via workable_jobs Shortcode — Workable Api 6.4 Medium2025-09-11
CVE-2025-10246 lokibhardwaj PHP-Code-For-Unlimited-File-Upload f.php cross site scripting — PHP-Code-For-Unlimited-File-Upload 3.5 Low2025-09-11
CVE-2025-9910 jsondiffpatch 安全漏洞 — jsondiffpatch 4.7 Medium2025-09-11
CVE-2025-10235 Scada-LTS Reports reports.shtm cross site scripting — Scada-LTS 2.4 Low2025-09-11
CVE-2025-10234 Scada-LTS Data Point Edit data_point_edit.shtm cross site scripting — Scada-LTS 2.4 Low2025-09-10
CVE-2025-43783 Liferay Portal和Liferay DXP 跨站脚本漏洞 — Portal 6.1AIMediumAI2025-09-10
CVE-2025-43785 Liferay Portal和Liferay DXP 跨站脚本漏洞 — Portal 5.4AIMediumAI2025-09-10
CVE-2025-59035 Indico vulnerable to Cross-Site Scripting via LaTeX math code — indico 4.6 Medium2025-09-10
CVE-2025-8681 Pega Platform versions 7.1.0 to Infinity 24.2.2 are affected by a Stored XSS issue in a user interface component — Pega Infinity 5.5 Medium2025-09-10
CVE-2025-40725 Reflected Cross-Site Scripting (XSS) in Azon Dominator — Azon Dominator PHP script 6.1AIMediumAI2025-09-10
CVE-2025-10126 MyBrain Utilities <= 1.0.8 - Authenticated (Contributor+) Stored Cross-Site Scripting — MyBrain Utilities 6.4 Medium2025-09-10
CVE-2025-9857 Heateor Login – Social Login Plugin <= 1.1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting — Heateor Login – Social Login Plugin 6.4 Medium2025-09-10
CVE-2025-9367 Welcart e-Commerce <= 2.11.20 - Authenticated (Editor+) Stored Cross-Site Scripting — Welcart e-Commerce 5.5 Medium2025-09-10
CVE-2025-8388 PowerPack Lite for Elementor <= 2.9.4 - Authenticated (Contributor+) Stored Cross-Site Scripting Via 'cursor_url' — PowerPack Addons for Elementor (Free Widgets, Extensions and Templates) 6.4 Medium2025-09-10
CVE-2025-49461 Zoom Workplace Clients - Cross-site Scripting — Zoom Workplace Clients 4.3 Medium2025-09-09
CVE-2025-7746 Schneider Electric ATV Series 跨站脚本漏洞 — ATV630/650/660/680/6A0/6B0/6L0 Altivar Process Drives 6.1AIMediumAI2025-09-09
CVE-2025-34178 Netgate pfSense CE Suricata package v7.0.8_2 Stored Cross-Site Scripting — pfSense CE 5.4AIMediumAI2025-09-09
CVE-2025-34177 Netgate pfSense CE Suricata package v7.0.8_2 Stored Cross-Site Scripting — pfSense CE 5.4AIMediumAI2025-09-09
CVE-2025-58765 wabac.js has XSS vulnerability in 404 error handling logic — wabac.js 7.1 High2025-09-09
CVE-2025-34175 Netgate pfSense CE Suricata package v7.0.8_2 Reflected Cross-Site Scripting — pfSense CE 6.1AIMediumAI2025-09-09
CVE-2025-34174 Netgate pfSense CE Status_Traffic_Totals Package v2.3.2_7 Stored Cross-Site Scripting — pfSense CE 5.4AIMediumAI2025-09-09
CVE-2025-34172 Netgate pfSense CE HAProxy Package 0.63_10 Reflected Cross-Site Scripting — pfSense CE 6.1AIMediumAI2025-09-09
CVE-2025-36125 IBM Hardware Management Console - Power Systems cross-site scripting — Hardware Management Console 6.4 Medium2025-09-09
CVE-2025-55054 Baicells EG7035E-M11 跨站脚本漏洞 — EG7035E-M11 6.1 Medium2025-09-09

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 23434 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.