CVE-2026-5167General

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

The Masteriyo LMS – Online Course Builder for eLearning, LMS & Education plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in versions up to and including 2.1.7. This is due to insufficient webhook signature verification in the handle_webhook() function. The webhook endpoint processes unauthenticated requests and only performs signature verification if both the webhook_secret setting is configured AND the HTTP_STRIPE_SIGNATURE header is present. Since webhook_secret defaults to an empty string, the webhook processes attacker-controlled JSON payloads without any verification. This makes it possible for unauthenticated attackers to send fake Stripe webhook events with arbitrary order_id values in the metadata, mark any order as completed without payment, and gain unauthorized access to paid course content.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • General: 1 classified signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-04-08); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-04-08: 1Mentions · 2026-04-13: 1Technical Details · 2026-04-08: 1Technical Details · 2026-04-13: 104-0804-13
Signal classification2 categories
General
150.0%
Disclosure
150.0%
Referenced assets2 URLs
By indicator
Classification over time
DateTotalLabels
2026-04-081
General1
2026-04-131
Disclosure1
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-5167 The Masteriyo LMS – Online Course Builder for eLearning, LMS & Education plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in versi… https://www.cve.org/CVERecord?id=CVE-2026-5167

    Post summary

    The text announces CVE-2026-5167, highlighting an Authorization bypass flaw in the Masteriyo LMS WordPress plugin and provides a link to the CVE record.

    00000110
    57.1K followersView on X
  • CyberDudeBivash® | Global Cybersecurity Company@cyberbivash
    General

    🚨 CYBERDUDEBIVASH SENTINEL APEX ALERT 🚨 Threat: CVE-2026-5167 - Masteriyo LMS <= 2.1.7 - Unauthenticated Authorization Bypass to Arbitrary Order Completion via Stripe Webhook Endpoint Intel Report: https://ift.tt/ZDS3lVB

    Post summary

    The alert announces CVE-2026-5167 affecting Masteriyo LMS ≤2.1.7, describing an unauthenticated authorization bypass through the Stripe webhook endpoint, but offers no PoC, exploit code, patch, or evidence of active exploitation.

    0000038
    281 followersView on X

Explore more