Is WPO365 safe to use?

Laskyr does not give safety verdicts. No known unpatched vulnerabilities in the latest version (6.3). As of 2026-11-04. 2 issues are on record for older versions; version 6.3 or newer fixes all of them that state a fix. Keep WPO365 on the latest version (6.3) and remove it if you do not use it.

Which versions of WPO365 are vulnerable?

Known issues on record (newest first): Stored cross-site scripting (XSS) (6.2 and older, fixed in 6.3); Open redirect (3.2 and older, fixed in 3.3). The full list with sources is on this page.

What is the latest version of WPO365?

6.3, according to wordpress.org (last updated 2026-10-18). It has 10,000+ active installs.

What should I do if my WPO365 is out of date?

Take a backup, then update it from Dashboard > Updates (or run wp plugin update wpo365-msgraphmailer). If you cannot update right away, deactivate it until you can. If you think the site was already attacked, run a free scan at https://laskyr.com/scan.

Plugins · wpo365-msgraphmailer · data as of 2026-11-04

Is WPO365 safe? Known vulnerabilities and latest version

Latest version: 6.3
Last updated: 2026-10-18
Active installs: 10,000+
Known issues on record: 2
Unpatched in latest: 0
Tested up to WP: 7.1.4 · PHP 7.4+

Send WordPress emails from a M365 / Exchange Online Mailbox using Microsoft Graph, leveraging OAuth for authentication which is more secure than SMTP — by Marco van Wieren

What to do

Update to the latest version (6.3). Anything older than 6.3 has at least one known issue listed below. Dashboard → Updates, or Plugins → “update now”.
If you cannot update right away, deactivate it until you can.
Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
If you ran a vulnerable version and something looks off (spam pages, strange admins, redirects), run the free scan.

With WP-CLI: wp plugin get wpo365-msgraphmailer --field=version shows what you run; wp plugin update wpo365-msgraphmailer updates it.

Check your version

Known vulnerabilities

2 on record, newest first. “Affected” is the version range the source gives; “fixed in” is the version the source names, or (marked *) the first wordpress.org release after the last affected version.

high 7.2 CVE-2026-107759 · published 2026-10-31

Stored cross-site scripting (XSS) in WPO365 (6.2 and older)

Affected: 6.2 and older
Fixed in: 6.3 *
Access needed (per CVSS): No login needed
Range from: CVE record (the advisory publisher) · score by Wordfence

Details from the advisory

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.

NVD CVE-2026-107759 Wordfence advisory Code change (fix)Plugin source

medium 6.1 CVE-2025-1488 · published 2025-02-24

Open redirect in WPO365 (3.2 and older)

Affected: 3.2 and older
Fixed in: 3.3 *
Access needed (per CVSS): No login needed; someone on the site has to click a link or open a page
Range from: CVE record (the advisory publisher) · score by NVD

Details from the advisory

The WPO365 | MICROSOFT 365 GRAPH MAILER plugin for WordPress is vulnerable to Open Redirect in all versions up to, and including, 3.2. This is due to insufficient validation on the redirect url supplied via the 'redirect_to' parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if 1. they can successfully trick them into performing an action and 2. the plugin is activated but not configured.

NVD CVE-2025-1488 Wordfence advisory Code change (fix)wordpress.org wpo365.com

Recent activity

2026-10-18 — latest release on wordpress.org (6.3).
2026-10-31 — Stored cross-site scripting (XSS) disclosed (CVE-2026-107759), fixed in 6.3.
2025-02-24 — Open redirect disclosed (CVE-2025-1488), fixed in 3.3.

Free. We check the CVE feeds every day and email you only when a new issue for WPO365 (wpo365-msgraphmailer) is published or a fix ships. Unsubscribe in one click.

Browse vulnerabilities

Types found in this plugin: Cross-site scripting (XSS) (1) · Open redirect (1)

Where this data comes from

Version, last update, installs: wordpress.org/plugins/wpo365-msgraphmailer (Plugins API), fetched 2026-11-04.
Vulnerabilities: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
Each record links to its CVE page and to the original advisory (Wordfence, Patchstack or WPScan) where there is one. We only list a CVE here when its references or its advisory name this exact plugin, so a few real issues may be missing; none should be about a different plugin. Spot an error? Email Daniel.

Badge for your site or docs (states facts with a date, not a verdict):

<a href="https://laskyr.com/plugins/wpo365-msgraphmailer"><img src="https://laskyr.com/plugins/wpo365-msgraphmailer/badge.svg" alt="WPO365 vulnerability status"></a>

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