CVE-2026-5229Receive Notifications After Form Submitting – Form Notify for Any Forms <= 1.1.10 - Unauthenticated Authentication Bypass via LINE OAuth Callback
- 9.8CriticalCVSS base score
- 0.73%Exploitation in 30 daysEPSS · top 45% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which WordPress account to authenticate after a LINE OAuth login. When LINE doesn't provide an email address (which is common), the plugin falls back to reading the 'form_notify_line_email' cookie value without verifying that the LINE account is associated with that email address. This makes it possible for unauthenticated attackers to gain access to any user account on the site, including administrator accounts, by completing a LINE OAuth flow with their own LINE account while injecting a malicious cookie containing the target victim's email address.
Timeline
ID reserved
By Wordfence
- 45 days later
· 45 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.73% · top 45% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
m615926 · Receive Notifications After Form Submitting – Form Notify for Any Forms
- affected ≤ 1.1.10
References
References10
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2f0a7d6f-9b95-4052-bab3-85aca01f6ab7?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L72 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L72 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/Route.php#L116-L118 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/Route.php#L116-L118 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L53 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L53 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3517908%40form-notify&new=3517908%40form-notify&sfp_email=&sfph_mail= (opens in a new tab)
- https://github.com/oberonlai/form-notify/commit/5eab0ea (opens in a new tab)
- https://github.com/oberonlai/form-notify/commit/9780764 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-30516 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-5229)Record last updated .