Plugins · wp-mailster · data as of 2026-11-04
Is WP Mailster safe? Known vulnerabilities and latest version
- Latest version
- 1.9.2.0
- Last updated
- 2026-10-18
- Active installs
- 300+
- Known issues on record
- 18
- Unpatched in latest
- 0
- Tested up to WP
- 7.1.4 · PHP 7.4+
WP Mailster allows your users to be part of a group and communicate by email without having to log into a website. — by brandtoss
What to do
- Update to the latest version (1.9.2.0). Anything older than 1.9.2.0 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 wp-mailster --field=version shows what you run; wp plugin update wp-mailster updates it.
Check your version
Known vulnerabilities
18 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 7.1 CVE-2026-111830 · published 2026-10-22
Stored cross-site scripting (XSS) in WP Mailster (1.9.1.0 and older)
- Affected
- 1.9.1.0 and older
- Fixed in
- 1.9.2.0
- 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 Patchstack
Details from the advisory
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.
critical 10.0 CVE-2026-111832 · published 2026-10-21
Arbitrary file upload in WP Mailster (1.9.1.0 and older)
- Affected
- 1.9.1.0 and older
- Fixed in
- 1.9.2.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
Unrestricted Upload of File with Dangerous Type vulnerability in WP Mailster WP Mailster wp-mailster allows Upload a Web Shell to a Web Server.This issue affects WP Mailster: from n/a through 1.9.1.0.
medium 6.5 CVE-2026-111829 · published 2026-10-19
File inclusion in WP Mailster (1.9.1.0 and older)
- Affected
- 1.9.1.0 and older
- Fixed in
- 1.9.2.0
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber)
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in WP Mailster WP Mailster wp-mailster allows PHP Local File Inclusion.This issue affects WP Mailster: from n/a through 1.9.1.0.
high 7.1 CVE-2026-105061 · published 2026-10-06
Cross-site scripting (XSS) in WP Mailster (1.9.0.0 and older)
- Affected
- 1.9.0.0 and older
- Fixed in
- 1.9.1.0
- 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 Patchstack
Details from the advisory
Unauthenticated Cross Site Scripting (XSS) in WP Mailster <= 1.9.0.0 versions.
medium 5.3 CVE-2026-105055 · published 2026-10-05
Missing authorization check in WP Mailster (1.9.0.0 and older)
- Affected
- 1.9.0.0 and older
- Fixed in
- 1.9.1.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
Missing Authorization vulnerability in WP Mailster WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through 1.9.0.0.
high 7.1 CVE-2025-24688 · published 2025-02-14
Reflected cross-site scripting (XSS) in WP Mailster (1.8.20.0 and older)
- Affected
- 1.8.20.0 and older
- Fixed in
- 1.8.21.0
- 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 Patchstack
Details from the advisory
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.20.0.
medium 6.5 CVE-2025-24567 · published 2025-02-14
Information disclosure in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber)
- Range from
- CVE record (the advisory publisher) · score by Patchstack
Details from the advisory
Insertion of Sensitive Information Into Sent Data vulnerability in brandtoss WP Mailster wp-mailster allows Retrieve Embedded Sensitive Data.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
medium 6.1 CVE-2025-24598 · published 2025-02-04
Reflected cross-site scripting (XSS) in WP Mailster (1.8.17.0 and older)
- Affected
- 1.8.17.0 and older
- Fixed in
- 1.8.18.0
- 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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.17.0.
medium 6.1 CVE-2025-24559 · published 2025-02-03
Reflected cross-site scripting (XSS) in WP Mailster (1.8.15.0 and older)
- Affected
- 1.8.15.0 and older
- Fixed in
- 1.8.16.0
- 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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Reflected XSS.This issue affects WP Mailster: from n/a through <= 1.8.15.0.
high 7.5 CVE-2025-22303 · published 2025-01-07
Information disclosure in WP Mailster (1.8.17.0 and older)
- Affected
- 1.8.17.0 and older
- Fixed in
- 1.8.18.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Insertion of Sensitive Information Into Sent Data vulnerability in brandtoss WP Mailster wp-mailster allows Retrieve Embedded Sensitive Data.This issue affects WP Mailster: from n/a through <= 1.8.17.0.
high 8.8 CVE-2024-54355 · published 2024-12-16
Cross-site request forgery (CSRF) in WP Mailster (1.8.17.0 and older)
- Affected
- 1.8.17.0 and older
- Fixed in
- 1.8.18.0
- 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
Cross-Site Request Forgery (CSRF) vulnerability in brandtoss WP Mailster wp-mailster allows Cross Site Request Forgery.This issue affects WP Mailster: from n/a through <= 1.8.17.0.
critical 9.8 CVE-2024-53807 · published 2024-12-06
SQL injection in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in brandtoss WP Mailster wp-mailster allows Blind SQL Injection.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
high 8.8 CVE-2024-53803 · published 2024-12-06
Missing authorization check in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber)
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
high 7.5 CVE-2024-53804 · published 2024-12-06
Information disclosure in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Insertion of Sensitive Information Into Sent Data vulnerability in brandtoss WP Mailster wp-mailster allows Retrieve Embedded Sensitive Data.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
critical 9.8 CVE-2024-53805 · published 2024-12-06
Missing authorization check in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Missing Authorization vulnerability in brandtoss WP Mailster wp-mailster allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
medium 5.4 CVE-2024-11782 · published 2024-12-03
Stored cross-site scripting (XSS) in WP Mailster (1.8.17.0 and older)
- Affected
- 1.8.17.0 and older
- Fixed in
- 1.8.18.0 *
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber); 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 WP Mailster plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'mst_subscribe' shortcode in all versions up to, and including, 1.8.17.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
NVD CVE-2024-11782Wordfence advisoryCode change (fix)Plugin source
medium 5.4 CVE-2024-53737 · published 2024-11-28
Stored cross-site scripting (XSS) in WP Mailster (1.8.16.0 and older)
- Affected
- 1.8.16.0 and older
- Fixed in
- 1.8.17.0
- Access needed (per CVSS)
- Needs a low-level account (e.g. subscriber); 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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in brandtoss WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through <= 1.8.16.0.
medium 6.1 CVE-2017-17451 · published 2017-12-07
Cross-site scripting (XSS) in WP Mailster (older than 1.5.5)
- Affected
- older than 1.5.5
- Fixed in
- 1.5.5
- Access needed (per CVSS)
- No login needed; someone on the site has to click a link or open a page
- Range from
- NVD analysis · score by NVD
Details from the advisory
The WP Mailster plugin before 1.5.5 for WordPress has XSS in the unsubscribe handler via the mes parameter to view/subscription/unsubscribe2.php.
NVD CVE-2017-17451wordpress.orgpacketstormsecurity.comwpvulndb.com
Recent activity
- 2026-10-18 — latest release on wordpress.org (1.9.2.0).
- 2026-10-22 — Stored cross-site scripting (XSS) disclosed (CVE-2026-111830), fixed in 1.9.2.0.
- 2026-10-21 — Arbitrary file upload disclosed (CVE-2026-111832), fixed in 1.9.2.0.
- 2026-10-19 — File inclusion disclosed (CVE-2026-111829), fixed in 1.9.2.0.
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Browse vulnerabilities
- Published this week
- Unpatched in the latest version
- By type of vulnerability
- Plugins by brandtoss (2 tracked)
Types found in this plugin: Cross-site scripting (XSS) (8) · Missing authorization (3) · Sensitive data exposure (3) · Arbitrary file upload (1) · File inclusion (1) · Cross-site request forgery (CSRF) (1) · SQL injection (1)
Where this data comes from
- Version, last update, installs: wordpress.org/plugins/wp-mailster (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/wp-mailster"><img src="https://laskyr.com/plugins/wp-mailster/badge.svg" alt="WP Mailster vulnerability status"></a>