CVE-2026-33143CWE-345

CVE-2026-33143

High · published March 21, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.34, the WhatsApp POST webhook handler (/notification/whatsapp/webhook) processes incoming status update events without verifying the Meta/WhatsApp X-Hub-Signature-256 HMAC signature, allowing any unauthenticated attacker to send forged webhook payloads that manipulate notification delivery status records, suppress alerts, and corrupt audit trails. The codebase already implements proper signature verification for Slack webhooks. This issue has been patched in version 10.0.34.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-03-21T01:17Z
Affected products (1)
ProductVersionsFixed in
hackerbay/oneuptime< 10.0.3410.0.34
References (1)
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-g5ph-f57v-mwjc · [email protected]
EPSS history
Timeline
  • 20 MAR 20:05Z
    OneUptime: WhatsApp Webhook Missing Signature Verification
    cvelistv5