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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 22329

22329 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-2026-26059 ChurchCRM has Stored Cross-Site Scripting (XSS) in GroupEditor.php — CRM 5.4 -2026-02-19
CVE-2026-23619 GFI MailEssentials AI < 22.4 General Settings Local Domains Domain Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23618 GFI MailEssentials AI < 22.4 Anti-Spam Spam Keyword Checking Subject Condition Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23617 GFI MailEssentials AI < 22.4 Anti-Spam Spam Keyword Checking Body Condition Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23616 GFI MailEssentials AI < 22.4 Anti-Spam Anti-Spoofing Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23615 GFI MailEssentials AI < 22.4 Anti-Spam Sender Policy Framework Email Exceptions Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23614 GFI MailEssentials AI < 22.4 Anti-Spam Sender Policy Framework IP Exceptions Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23613 GFI MailEssentials AI < 22.4 Anti-Spam URI DNS Blocklist Domain Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23612 GFI MailEssentials AI < 22.4 Anti-Spam IP DNS Blocklist Domain Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23611 GFI MailEssentials AI < 22.4 Anti-Spam IP Blocklist Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23610 GFI MailEssentials AI < 22.4 POP2Exchange POP3 Server Login Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23609 GFI MailEssentials AI < 22.4 General Settings Perimeter SMTP Servers Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23608 GFI MailEssentials AI < 22.4 Email Management Mail Monitoring Rule Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23607 GFI MailEssentials AI < 22.4 Anti-Spam Whitelist Description Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23606 GFI MailEssentials AI < 22.4 Advanced Content Filtering Rule Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23605 GFI MailEssentials AI < 22.4 Attachment Filtering Rule Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-23604 GFI MailEssentials AI < 22.4 Keyword Filtering Rule Stored XSS — MailEssentials AI 5.4 Medium2026-02-19
CVE-2026-25739 Indico affected by Cross-Site-Scripting via material uploads — indico 5.4 Medium2026-02-19
CVE-2025-71241 SPIP < 4.3.6 Cross-Site Scripting in Private Area — SPIP 6.1 Medium2026-02-19
CVE-2025-71240 SPIP < 4.2.15 Cross-Site Scripting via Code Tags — SPIP 5.4 Medium2026-02-19
CVE-2019-25430 Comodo Dome Firewall 2.7.0 Reflected Cross-Site Scripting via vpn_users — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25429 Comodo Dome Firewall 2.7.0 Reflected Cross-Site Scripting via openvpn_advanced — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25428 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via openvpn_users — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25427 Comodo Dome Firewall 2.7.0 Reflected Cross-Site Scripting via antispyware — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25425 Comodo Dome Firewall 2.7.0 Reflected Cross-Site Scripting via smtpconfig — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25426 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via dnsmasq — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25424 Comodo Dome Firewall 2.7.0 Reflected Cross-Site Scripting via https_exceptions — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25423 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via proxyconfig — Comodo Dome Firewall 6.1 Medium2026-02-19
CVE-2019-25422 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via vpnfw — Comodo Dome Firewall 7.2 High2026-02-19
CVE-2019-25421 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via policyfw — Comodo Dome Firewall 6.1 Medium2026-02-19

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 22329 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.