CVE-2026-4986: WPForms Lite < 1.10.0.5 – Unauthenticated PayPal Webhook Forgery
Vulnerability summary
CVE-2026-4986 is a medium (CVSS 5.3) Missing Authorization vulnerability in unknown wpforms. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.8% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 1.10.0.5.
Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 09-06-2026Last modifiedVulnerability information updated.
Description
The WPForms WordPress plugin before 1.10.0.5 does not verify the authenticity of incoming PayPal webhook events before processing them, allowing unauthenticated attackers to forge webhook payloads and manipulate the payment state of arbitrary transactions.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- wordfenceSource5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
25%
Versus all other CVEs
30-day change
Increase +0.13 pp
From 0.20% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-862Missing AuthorizationThe product does not perform an authorization check when an actor attempts to access a resource or perform an action.
- CWE-602Client-Side Enforcement of Server-Side SecurityThe product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server.
Affected systems
Unknown1 product
- wpforms≥ 1.10.0.1, < 1.10.0.5
Wordpress1 product
- wpforms-lite≤ 1.10.0.4 (fixed in 1.10.0.5)
2 vendors · 2 products