CVE-2026-107759
7.2, highWPO365 | MICROSOFT 365 GRAPH MAILER Cross-Site Scripting Vulnerability
- CVSS
- 7.2, high high CVSS v3.1
- EPSS, next 30 days
- 0.3% higher than 19.5% of scored CVEs
- Exploitation
- No public evidence
- Published
- 31 Oct 2026yesterday
Description
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.
Details
- Vendor
- Wpo365
- Product
- WPO365 | MICROSOFT 365 GRAPH MAILER
- Weakness
- CWE-79 (opens in a new tab)
- Status
- Received
- Updated
- 31 Oct 2026
- Assigner
- security@wordfence.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
References 7
Other references 7
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Core/Script_Helpers.php#L142 (opens in a new tab)
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Mail/Mailer.php#L71 (opens in a new tab)
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Services/Ajax_Service.php#L284 (opens in a new tab)
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/Services/Log_Service.php#L80 (opens in a new tab)
- plugins.trac.wordpress.org /browser/wpo365-msgraphmailer/tags/6.1/apps/dist/wizard-chunk-G9IB6WhS.js#L154 (opens in a new tab)
- plugins.trac.wordpress.org /changeset?reponame=&old=3752919%40wpo365-msgraphmailer&new=3752919%40wpo365-msgraphmailer (opens in a new tab)
- wordfence.com /threat-intel/vulnerabilities/id/d51ba0c2-588d-4241-977a-9649cb77c78e?source=cve (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2026-107759 in your network?
This page tells you how dangerous CVE-2026-107759 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-107759 comes with the devices to patch.
Learn more about EXYS7600 OCELOT -
EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
Learn more about EXYS7950 KONDRA
Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 1 Nov 2026, not the live upstream state.