CVE-2026-2840

Email Encoder – Protect Email Addresses and Phone Numbers <= 2.4.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via eeb_mailto Shortcode

6.4 Medium

The Email Encoder – Protect Email Addresses and Phone Numbers plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'eeb_mailto' shortcode in all versions up to, and including, 2.4.4 due to insufficient input sanitization and output escaping. 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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.26%Up 0.2 points since Apr 17, 2026

What each source reports

CVE List Score used 6.4

Email Encoder – Protect Email Addresses and Phone Numbers <= 2.4.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via eeb_mailto Shortcode

Record: CVE-2026-2840
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2026-23229 6.4

Record: EUVD-2026-23229
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6f47-h5cp-7cwm 6.4

The Email Encoder – Protect Email Addresses and Phone Numbers plugin for WordPress is vulnerable...

Record: GHSA-6f47-h5cp-7cwm
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.4

Record: CVE-2026-2840
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

onlineoptimisation email encoder – protect email addresses and phone numbers

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-2840 is a medium vulnerability (CVSS 6.4) in Onlineoptimisation Email Encoder – Protect Email Addresses And Phone Numbers, published April 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. No source names a fixed version.