Vulnerability Database

346,508

Total vulnerabilities in the database

@grackle-ai/server: Unescaped Error String in renderPairingPage() HTML Template — @grackle-ai / server

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Impact

The renderPairingPage() function embeds the error parameter directly into HTML without escaping:

const errorHtml = error ? `<p style="color:#e74c3c">${error}</p>` : "";

All current call sites pass hardcoded strings, so this is not exploitable today. However, the function is architecturally fragile — if a future code change passes user-controlled or dynamic content into the error parameter, it would create an XSS vulnerability.

The renderAuthorizePage() function in the same file correctly uses escapeHtml() for dynamic content, making this an inconsistency.

Affected code:

  • packages/server/src/index.ts:64-89renderPairingPage() with unescaped error interpolation
  • Compare: packages/server/src/index.ts:130renderAuthorizePage() correctly uses escapeHtml()

Patches

v0.70.1

Fix: Apply escapeHtml() to the error parameter:

const errorHtml = error ? `<p style="color:#e74c3c">${escapeHtml(error)}</p>` : "";

Workarounds

No workaround needed — all current callers pass hardcoded strings.

Resources

  • CWE-79: Improper Neutralization of Input During Web Page Generation
  • File: packages/server/src/index.ts

No technical information available.

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

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