Chrome Web Store is an online catalogue for browser extensions, themes and apps used with the Chrome browser. It lets users and administrators install add-ons, while organisations may restrict or approve extensions because they can request broad browser permissions, access web content and introduce supply-chain risk.
What Chrome Web Store Is Used For
Chrome Web Store is the distribution point for Chrome add-ons, so the security story begins with what extensions are allowed to do in the browser. That includes page access, content reading, permission prompts, and whether an extension is approved, blocked, or left unmanaged.
Because browser extensions operate inside a user’s browsing session, the store is not just a catalogue, it is also a policy boundary. Organisations often use extension allowlisting, inventory, and approval workflows to decide which add-ons can reach internal web apps, identities, or sensitive data.
Why the Chrome Web Store Matters to Security
The main risk is not the store itself, but the trust placed in extensions published through it. A legitimate listing can still become dangerous if an attacker gains publishing access, a vendor is compromised, or an extension later requests more power than the business intended.
That is why security teams treat the store as part of the software supply chain for the browser. An extension can inherit the user’s authenticated web sessions, observe content on visited pages, and act with the same browser context that a human user relies on for normal work.
Common Exposure Patterns and Control Decisions
The practical exposure question is whether the organisation knows which extensions are installed, who approved them, and what permissions they have. Unmanaged browser sprawl makes it easy for risky extensions to remain installed long after they were first added.
Extension governance usually comes down to three decisions: what to approve, what to block, and what to monitor. Those decisions are strongest when they are based on a real inventory, permission review, vendor trust assessment, and a clear response path for suspicious or hijacked extensions.
For broader extension hardening guidance, the Browser Extension Security Guide covers permissions, allowlisting, risk scoring, and response patterns that help organisations manage this catalogue safely.
How Chrome Web Store Fits into Browser Supply-Chain Risk
Chrome Web Store risk often appears when an extension changes ownership, is updated maliciously, or is installed because a trusted-looking listing bypassed normal review. The browser then becomes the delivery channel for credential theft, session abuse, or silent data collection.
A real-world example is the Cyberhaven Chrome extension breach 2024, where attackers abused publishing access and pushed a malicious update through the extension ecosystem. That kind of event shows why extension approval is a continuous control, not a one-time installation decision.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 addresses the attack and risk surface, while CIS Controls v8, SLSA and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| CIS Controls v8 | CIS-5 — Account Management | Chrome Web Store governance depends on controlling which extensions accounts can install or approve. |
| Recommendation — Inventory and govern browser extensions through a centralized approval and removal process. | ||
| OWASP Non-Human Identity Top 10 | NHI-03 — Vulnerable Third-Party NHI | Extension publishing and updates create third-party supply-chain exposure through trusted browser add-ons. |
| Recommendation — Review third-party extension risk before allowing browser add-ons into production. | ||
| SLSA | Supply Chain Levels for Software Artifacts | Browser extension updates are software delivery artifacts whose integrity affects trusted browser execution. |
| Recommendation — Verify extension update provenance and integrity before trusting published browser add-ons. | ||
| NIST SP 800-53 Rev 5 | CM-8 — System Component Inventory | Extensions are software components that should be inventoried to control browser exposure. |
| SI-7 — Software, Firmware, and Information Integrity | Malicious or hijacked extensions are integrity failures delivered through the browser ecosystem. | |
| Recommendation — Maintain an inventory of installed browser extensions and remove unapproved components. Validate extension integrity and investigate suspicious updates or tampering. | ||
Related resources from NHI Mgmt Group
- What happens when a malicious extension is removed from the Chrome Web Store but still remains installed on user browsers?
- Chrome Web Store Featured Badge
- How should security teams govern Chrome extensions that can read sensitive web content?
- How should customer identity teams design omnichannel journeys without breaking authentication or consent across web, mobile, in-store, and connected devices?