CVE-2026-107759 json
WPO365 | MICROSOFT 365 GRAPH MAILER <= 6.2 - Unauthenticated Stored Cross-Site Scripting via Email Subject via wp_mail
published 2026-10-31 8 d ago modified 2026-11-02 6 d ago also EUVD-2026-114654
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
The WPO365 | MICROSOFT 365 GRAPH MAILER plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'Subject (via wp_mail/PHPMailer, e.g. CF7 your-subject)' parameter in all versions up to, and including, 6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is stored without authentication via any mail-sending feature that forwards a submitter-controlled subject (e.g. a Contact Form 7 form) when the Graph Mailer is enabled but OAuth authorization has not been completed, a default state immediately after plugin activation.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 d ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- wpo365 WPO365 | MICROSOFT 365 GRAPH MAILER
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
- wordfence.com /threat-intel/vulnerabilities/id/d51ba0c2-588d-4241-977a-9649cb77c78e?source=cve
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/apps/dist/wizard-chunk-G9IB6WhS.js#L154
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Mail/Mailer.php#L71
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Services/Log_Service.php#L80
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Core/Script_Helpers.php#L142
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Services/Ajax_Service.php#L284
- plugins.trac.wordpress.org /changeset?reponame=&old=3752919%40wpo365-msgraphmailer&new=3752919%40wpo365-msgraphmailer
Sources
- CVE List CVE-2026-107759
- NVD CVE-2026-107759
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.