Plugins · newsletter-optin-box · data as of 2026-11-04
Is Noptin safe? Known vulnerabilities and latest version
- Latest version
- 4.4.3
- Last updated
- 2026-10-28
- Active installs
- 10,000+
- Known issues on record
- 4
- Unpatched in latest
- 0
- Tested up to WP
- 7.1.4 · PHP 7.4+
Fast, lightweight newsletter plugin. Send new post notifications and newsletters, collect unlimited subscribers, and automate WordPress emails. ★★★★★ — by Noptin Newsletter Team
What to do
- Update to the latest version (4.4.3). Anything older than 4.4.0 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 newsletter-optin-box --field=version shows what you run; wp plugin update newsletter-optin-box updates it.
Check your version
Known vulnerabilities
4 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.
medium 5.4 CVE-2026-103482 · published 2026-10-10
Stored cross-site scripting (XSS) in Noptin (4.3.10 and older)
- Affected
- 4.3.10 and older
- Fixed in
- 4.4.0 *
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by Wordfence
Details from the advisory
The Simple Newsletter Plugin – Noptin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noptin_fields[<custom_field_merge_tag>] (e.g. first_name)' parameter in all versions up to, and including, 4.3.10 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 attack chain requires a published campaign post whose body contains a [[subscriber.*]] merge tag; the unauthenticated attacker first POSTs the entity-encoded payload to the public manage_preferences form (which issues its own nonce on the same page), then pivots execution by embedding their confirm_key in a campaign preview URL sent to a privileged user via social engineering.
NVD CVE-2026-103482Wordfence advisorygithub.comPlugin source
medium 5.9 CVE-2025-49871 · published 2025-06-17
Stored cross-site scripting (XSS) in Noptin (3.8.7 and older)
- Affected
- 3.8.7 and older
- Fixed in
- 4.0.0
- Access needed (per CVSS)
- Needs an admin-level account; 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 Noptin Newsletter Team Noptin newsletter-optin-box allows Stored XSS.This issue affects Noptin: from n/a through <= 3.8.7.
medium 5.3 CVE-2024-37456 · published 2024-11-01
Missing authorization check in Noptin (3.4.2 and older)
- Affected
- 3.4.2 and older
- Fixed in
- 3.4.3
- 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 Noptin Newsletter Noptin allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects Noptin: from n/a through 3.4.2.
critical 9.8 CVE-2022-46803 · published 2023-11-07
CSV injection in Noptin (1.9.5 and older)
- Affected
- 1.9.5 and older
- Fixed in
- 1.10.0
- Access needed (per CVSS)
- No login needed
- Range from
- CVE record (the advisory publisher) · score by NVD
Details from the advisory
Improper Neutralization of Formula Elements in a CSV File vulnerability in Noptin Newsletter Simple Newsletter Plugin – Noptin.This issue affects Simple Newsletter Plugin – Noptin: from n/a through 1.9.5.
Recent activity
- 2026-10-28 — latest release on wordpress.org (4.4.3).
- 2026-10-10 — Stored cross-site scripting (XSS) disclosed (CVE-2026-103482), fixed in 4.4.0.
- 2025-06-17 — Stored cross-site scripting (XSS) disclosed (CVE-2025-49871), fixed in 4.0.0.
- 2024-11-01 — Missing authorization check disclosed (CVE-2024-37456), fixed in 3.4.3.
Get an email when Noptin has a new vulnerability
Free. We check the CVE feeds every day and email you only when a new issue for Noptin (newsletter-optin-box) is published or a fix ships. Unsubscribe in one click.
Browse vulnerabilities
Types found in this plugin: Cross-site scripting (XSS) (2) · Missing authorization (1)
Where this data comes from
- Version, last update, installs: wordpress.org/plugins/newsletter-optin-box (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/newsletter-optin-box"><img src="https://laskyr.com/plugins/newsletter-optin-box/badge.svg" alt="Noptin vulnerability status"></a>