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CVE-2026-113667

MEDIUM 5.3

Published 2026-10-20 · Last modified 2026-10-21

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 30th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.3CVSS 4.0 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityLow

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Apostrophecms @Apostrophecms

Products Apostrophe Form Login Hcaptcha Login Recaptcha

Weakness (CWE)

  • CWE-116: : Improper Encoding or Escaping of Output

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • @apostrophecms/form npm

    pkg:npm/%40apostrophecms/form

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.5.5
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-44qr-rrjg-2cqq/GHSA-44qr-rrjg-2cqq.json"
  }
}
    GitHub Advisory Database · GHSA-44qr-rrjg-2cqq · Updated 2026-10-20T18:15:04.529028056Z
  • @apostrophecms/login-recaptcha npm

    pkg:npm/%40apostrophecms/login-recaptcha

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.2.1
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-44qr-rrjg-2cqq/GHSA-44qr-rrjg-2cqq.json"
  }
}
    GitHub Advisory Database · GHSA-44qr-rrjg-2cqq · Updated 2026-10-20T18:15:04.529028056Z
  • @apostrophecms/login-hcaptcha npm

    pkg:npm/%40apostrophecms/login-hcaptcha

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.3.0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-44qr-rrjg-2cqq/GHSA-44qr-rrjg-2cqq.json"
  }
}
    GitHub Advisory Database · GHSA-44qr-rrjg-2cqq · Updated 2026-10-20T18:15:04.529028056Z

All CVSS metrics

  • MEDIUM 5.3 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  • MEDIUM 5.3 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS