The Browser is the New Perimeter.
Monitor client-side behavior in real time and enforce configured controls on browser APIs and network destinations for scripts processed through SiteWall's enforcement mode.Add browser-side telemetry and policy controls to your security program.
What is SiteWall?
SiteWall by CellWall combines scheduled discovery, browser-side observability, and configurable policy enforcement. Unlike a traditional WAF at the network edge, its browser snippet records supported resource and API activity; enforcement mode can restrict configured API access and network destinations for scripts processed by the enforcement pipeline. It can support PCI DSS evidence workflows but does not by itself guarantee compliance.
Under the Hood
The Security Loop.
A continuous cycle of observation and active defense that keeps your digital supply chain secure.
Observe
Behavioral BaselineEvery script's execution path is mapped to establish a baseline of normal behavior.
Analyze
Threat IntelligenceReal-time analysis compares execution patterns against our global database of known attack vectors.
Intercept
Real-Time HookingMalicious network requests or sensitive DOM access are intercepted before execution.
Block
Policy EnforcementUnauthorized behavior is blocked instantly, and a forensic alert is dispatched to your dashboard.
LIVE PROTECTION
Monitor hidden behavior.
Not all threats load directly. SiteWall analyzes load flow chains to identify piggybacking—when an approved vendor silently loads unapproved third-party scripts.
FORENSIC TELEMETRY
Session-level security proof.
Security events include request and initiating-script context that can support investigations and audit evidence.
Track every resource.
SiteWall builds an inventory from scheduled scans and instrumented browser sessions, covering observed scripts, stylesheets, Fetch, XHR, and related resources.
Comprehensive Asset Mapping
Document first- and third-party resources observed on configured pages and instrumented sessions.
Behavioral Baseline Validation
Assign security signatures to every resource to immediately detect deviations from approved execution patterns.
Granular Control
SiteWall empowers you to define and enforce strict operational boundaries. Stop data leakage and unauthorized access by controlling exactly what code can do on your users' devices.
Geo-Restriction
Restrict script execution or data processing based on user geolocation to comply with regional data sovereignty laws and block high-risk regions.
API Access Control
Monitor and block access to sensitive browser APIs like Geolocation, Camera, and Cookie storage on a per-script basis to prevent privacy violations.
Network Request Guard
Strictly whitelist authorized domains for network requests (Fetch, XHR, WebSockets), preventing malicious scripts from exfiltrating data to unknown servers.
Issues and anomalies detection.
Stop chasing signatures and start monitoring behavior. SiteWall uses advanced heuristics to identify malicious intent the moment a script deviates from its established baseline.
Behavioral Heuristics
Automatically identify malicious patterns like form-grabbing, keylogging, and sensitive data scraping by monitoring DOM interactions in real-time.
Change Detection
Instantly detect and alert on unauthorized modifications to first-party or third-party scripts, ensuring code integrity across your entire application.
Execution Context Monitoring
Detect when a script attempts to run outside its expected sandbox, timeframe, or execution flow, neutralizing advanced evasion techniques.
Real-Time Runtime Protection.
Visibility is not enough. SiteWall actively intercepts and neutralizes threats in the browser as they happen, stopping attacks before they can execute.
Exfiltration Blocking
Identify and autonomously block network requests attempting to drop sensitive user data to unauthorized or suspicious external endpoints.
DOM Tampering Prevention
Stop malicious scripts from injecting fake login forms, altering payment fields, or modifying critical page elements to steal user credentials.
Zero-Day Mitigation
Halt execution based on malicious behavior patterns, providing immediate protection before a CVE is even published.
The Threat Intelligence Engine.
Our decision engine is powered by diverse, high-fidelity data streams, providing the context needed to make deterministic blocking decisions without false positives.
Live Traffic Telemetry
Behavioral telemetry collected from instrumented browser sessions in configured customer environments.
Scheduled AI Audits
Continuous baselining via our agentless crawlers to map your expected digital supply chain state.
Global Threat Advisories
Real-time integration with leading CVE databases, active exploit lists, and known malicious domain registries.
Proprietary ML Models
Advanced behavioral fingerprinting that learns your specific site's normal operational cadence to spot microscopic deviations.
Real-time Threat Neutralization.
Stop XSS, Magecart, and supply chain attacks at the point of execution. SiteWall provides a proactive enforcement layer that scales with your traffic.
Behavior and Anomaly Signals
Browser telemetry and scheduled scans surface changes in script behavior for security review.
Active Script Blocking
Kill malicious network requests and DOM access at the source. Our enforcement layer acts before data can be exfiltrated.
Inventory & Policy Workflows
Maintain resource inventory and configure enforcement policies without claiming automatic SRI or CSP deployment.
REGULATORY AUTOMATION
Compliance Evidence Workflows.
SiteWall maps browser observations and configured controls to compliance workflows, producing evidence that can support review of your client-side security posture.
Inventory & Justification
Maintain a continuous, automated inventory of all scripts running on payment pages, along with their mandatory business justification and cryptographic integrity.
Dynamic inventory tracking with built-in justification workflows and script authorization.
Tamper Detection
Real-time detection and alerting for any unauthorized changes to HTTP headers and payment page content.
Instant alerts and blocking of any unauthorized DOM or header modifications.
Security of Processing & Privacy
Ensure data protection by design by actively preventing unauthorized data collection and restricting script execution based on strict policies.
Automatic network request blocking to unverified or out-of-bounds third-party domains.
Data Leakage Prevention
Apply preventative measures against data leakage by controlling how third-party vendors and client-side applications handle sensitive information.
Active interception of unapproved outbound connections and DOM data exfiltration.
HOW WE COMPARE
SiteWall vs Traditional WAFs
Why the network perimeter is no longer enough.
| Capability | Traditional WAF | SiteWall |
|---|---|---|
| Server-Side Protection | Yes | Complementary |
| Browser Execution Monitoring | No | Yes (Real-time) |
| Third-Party Script Analysis | None | Yes (Deep) |
| Magecart Prevention | Limited | Yes (Active) |
| PCI-DSS 4.0 6.4.3 Compliance | No | Yes (Automated) |
| DOM Manipulation Guard | No | Yes |
| Data Exfiltration Blocking | Network Only | Behavioral & Network |
Choose your enforcement depth.
SiteWall supports scheduled external discovery, browser-side observability, and an enforcement mode for configured policy controls.
External AI Audit
Establish a security baseline with agentless, AI-driven periodic audits. Our crawlers simulate user behavior across your public-facing infrastructure to identify known vulnerabilities, expired certificates, and obvious supply chain risks without modifying a single line of your code.
Passive Observability
Gain high-fidelity, real-time insights with a non-blocking monitoring layer. By deploying a lightweight passive snippet, you receive instant alerts for script behavior deviations, unauthorized DOM access, and emerging threats as they happen in your users' browsers.
Active Enforcement
Apply configured controls to sensitive browser API calls and network destinations for scripts processed through SiteWall's enforcement mode.
Script Processing
Optionally process eligible cross-origin scripts through CellWall so configured API and network policies can be applied.
Expanded Enforcement
Extend enforcement coverage to more eligible scripts after testing policies and compatibility in your environment.
SECURITY STACK
Seamless Security Sync.
Integrate SiteWall alerts and telemetry directly into your SIEM, SOAR, or monitoring dashboard. Native support for major platforms and custom webhooks.
Tailored Pricing for Optimal Value
Choose the plan that fits your business needs. Scale as you grow with our flexible options.
Lite
$49/seat/month
- Audit Interval: 12h
- Resource Scanning
- Alerts & Issues
- Weekly Reports
- 14-day free trial
Basic
$199/seat/month
- Audit Interval: 6h
- Realtime monitoring
- Reporting & Analytics
- Permissions
- 14-day free trial
Enterprise
Custom
- Audit Interval: 1h
- Process Own Resources
- Custom Integrations
- SLA Guarantee
- Dedicated Manager
RESOURCES
Expand your knowledge.
What Is Client-Side Security? Risks, Attacks, and Best Practices
Learn what client-side security protects, how browser attacks work, why third-party JavaScript creates risk, and which controls secure modern web applications.
Types of Client-Side Attacks: 12 Browser Threats to Know
Explore 12 common client-side attacks, how they reach the browser, what warning signs to investigate, and which controls can reduce the risk.
Technical Analysis: The Laravel-Lang 'Ghost Tag' Supply Chain Attack
A deep dive into the May 2026 supply chain attack on Laravel-Lang, detailing the tag-squatting techniques and the 'Mini Shai-Hulud' credential stealer.
Content Security Policy (CSP): Enhancing Web Application Security
A guide to understanding and implementing Content Security Policy (CSP) to protect your web applications from XSS and other attacks.
CryptoJack: Understanding and Preventing Cryptocurrency Mining Attacks
Learn about cryptojacking, how it infiltrates your systems, its impact, and practical steps to prevent these stealthy cryptocurrency mining attacks.
SECURITY INSIGHTS
Is SiteWall a replacement for a WAF?
No. SiteWall is a client-side security layer, while a WAF protects server-side and edge traffic.
Solution:We complement your existing WAF by covering the 'blind spot' of the user's browser.
How does SiteWall block Magecart?
Magecart scripts attempt to send captured form data (like credit cards) to an external drop-server.
Solution:SiteWall detects unauthorized network requests to unknown domains and kills the connection before the data leaves the browser.
How is this different from a CSP (Content Security Policy)?
CSPs are notoriously difficult to maintain and often break sites in production.
Solution:SiteWall supplies browser telemetry, policy controls, and CSP-related observations. It does not claim to automatically deploy or maintain your site's CSP.
Does SiteWall impact page performance?
Security should never come at the cost of speed.
Solution:SiteWall uses a non-blocking, asynchronous architecture that executes in parallel with your scripts, adding negligible overhead.
Can SiteWall detect Piggybacking scripts?
Yes. Approved third-party scripts often load their own unvetted dependencies.
Solution:Our load-flow analysis traces the entire dependency chain, allowing you to block 'shadow' scripts loaded by your vendors.
What about PCI-DSS 4.0 compliance?
PCI-DSS 4.0 requirements (6.4.3 and 11.6.1) mandate that businesses manage third-party scripts and detect unauthorized changes to payment pages.
Solution:SiteWall provides the automated inventory and behavioral monitoring required to satisfy these new compliance standards.
Ready to secure your perimeter?
Join the world's most secure brands in defending the client-side execution environment.
*SiteWall is a security enforcement tool and should be part of a defense-in-depth strategy.