registry / @prosopo/procaptcha-bundle / 4.6.1
@prosopo/procaptcha-bundle@4.6.1
AI Security Review
scanned 6d ago · by lpm-firewall-aiThe entry point and detector prefetch serve the CAPTCHA widget's purpose, and the flagged module bridge is only a generated runtime import. The only identified reporting is sampled runtime telemetry disclosed in the changelog, sent to Prosopo with a build-time opt-out.
Static reason
One or more suspicious static signals were detected.
Trigger
Importing the browser entry point boots the widget; telemetry is conditional on a self-hosted build with a provider-list override and a successful 0.1% sample.
Impact
Normal CAPTCHA operation and limited disclosed usage measurement; no malicious behavior found.
Mechanism
The widget prefetches its detector using the site key and configured CAPTCHA options. The disclosed beacon sends the page hostname, site key, bundle version, and sample rate to Prosopo with cookies and referrer omitted; it can be disabled at build time.
AI rationale
The entry point and detector prefetch serve the CAPTCHA widget's purpose, and the flagged module bridge is only a generated runtime import. The only identified reporting is sampled runtime telemetry disclosed in the changelog, sent to Prosopo with a build-time opt-out.
Network endpoints1
beacon.prosopo.io/v1/b.gif
Decision evidence
public snapshotAI called this Clean at 96.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The package exports a browser CAPTCHA widget entry point and declares no install lifecycle scripts.
- Detector prefetch uses the site key and CAPTCHA options, and skips manual-start widgets.
- The changelog discloses the self-hosted usage beacon, its data, and how to disable it.
- The beacon is limited to builds with a provider-list override and samples about one render in a thousand; it sends the page hostname, site key, bundle version, and sample rate without cookies or a referrer.
- The flagged Rolldown runtime bridge only imports node:module and exports an empty module.
Evidence against
Behavioral surface
EnvironmentVarsFilesystem
HighEntropyStringsUrlStrings
Source & flagged code
6 flaggeddist/esm/index.jsView file
7package = @prosopo/procaptcha-bundle; repositoryIdentity = captcha; dependency = @prosopo/procaptcha-common
L7: import { WidgetThemeResolver } from "./util/widgetThemeResolver.js";
L8: import { getWindowCallback } from "@prosopo/procaptcha-common";
L9: import { PROCAPTCHA_START_EVENT, StartModeEnum } from "@prosopo/types";
High
Copied Package Dependency Bridge
Package metadata claims a different repository identity while copied source loads a runtime dependency bridge.
dist/esm/index.jsView on unpkg · L744> {
frictionless.prefetchDetector(process.env.PROSOPO_DEFAULT_ENVIRONMENT, common.pickIpMode(flags), siteKey, language, integration);
}).catch(() => void 0);
};
var PROCAPTCHA_E
Low
Ai Review Evidence
Detector prefetch uses the site key and CAPTCHA options, and skips manual-start widgets.
dist/esm/index.jsView on unpkg · L44package.jsonView file
6"main": "dist/esm/index.js",
"type": "module",
"sideEffects": false,
"engines": {
"node": "^24"
},
"exports": {
".": {
"types": "./dist/
Findings
1 High2 Medium9 Low
HighCopied Package Dependency Bridgedist/esm/index.js
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowSuspicious Lifecycle Evidencepackage.json
LowAi Review Evidencedist/esm/index.js
LowAi Review EvidenceCHANGELOG.md
LowAi Review Evidence.lpm-dependency-evidence-fe5a6db3-9b84-4277-9425-4cfdfb97cb80/2/npm-linux/dist/esm/usageBeacon.js
LowAi Review Evidence.lpm-dependency-evidence-fe5a6db3-9b84-4277-9425-4cfdfb97cb80/2/npm-linux/dist/esm/usageBeacon.js
Affected versions and remediation
This report applies to @prosopo/procaptcha-bundle@4.6.1.
See all versions of @prosopo/procaptcha-bundle for other recorded verdicts.
- Review the evidence and your use of @prosopo/procaptcha-bundle@4.6.1 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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