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OpenAdvisories
Medium · 5.3 CVE-2026-113667 EUVD-2026-105217GHSA-44qr-rrjg-2cqq

ApostropheCMS: CAPTCHA response token not URL-encoded

Published Oct 20, 2026 · Updated Oct 21, 2026 · Assigned by GitHub_M

Description

ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the Form add-on, 1.2.1 of login-recaptcha, and 1.3.0 of login-hcaptcha, these three CAPTCHA integrations interpolate an unencoded user-supplied response token into the provider verification request. Crafted tokens can smuggle request parameters and disrupt CAPTCHA verification and CAPTCHA-gated form or login flows; automated bypass probing is possible, but a successful CAPTCHA bypass or secret disclosure is not established. This issue is fixed in Form 1.5.5, login-recaptcha 1.2.1, and login-hcaptcha 1.3.0.

Affected products

VendorProductAffectedFixed
apostrophecms apostrophe < 4.33.0 —
@apostrophecms form < 1.5.5 —
@apostrophecms login-hcaptcha < 1.3.0 —
@apostrophecms login-recaptcha < 1.2.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @apostrophecms/form < 1.5.5 1.5.5 GHSA-44qr-rrjg-2cqq
npm @apostrophecms/login-hcaptcha < 1.3.0 1.3.0 GHSA-44qr-rrjg-2cqq
npm @apostrophecms/login-recaptcha < 1.2.1 1.2.1 GHSA-44qr-rrjg-2cqq

References