Cross-site scripting in onlineoptimisation Email Encoder – Protect Email Addresses and…
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| onlineoptimisation | Email Encoder – Protect Email Addresses and Phone Numbers | up to 2.4.4 | — | No fix listed | CNA |
- Email Encoder – Protect Email Addresses and Phone Numbers Vendoronlineoptimisation Affected up to 2.4.4 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2840
- 2026-10-03 Alias added: GHSA-6f47-h5cp-7cwm
References
Other 3
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9987b5b4-33d8-4446-acbe-58c6cb5604df?source=cve
- https://plugins.trac.wordpress.org/changeset?old_path=/email-encoder-bundle/tags/2.4.4/src/Front/Shortcodes/MailtoShortcode.php&new_path=/email-encoder-bundle/tags/2.4.5/src/Front/Shortcodes/MailtoShortcode.php&old=3462208&new=3494181
- https://plugins.trac.wordpress.org/changeset?old_path=/email-encoder-bundle/tags/2.4.4/src/Validate/Encoding.php&new_path=/email-encoder-bundle/tags/2.4.5/src/Validate/Encoding.php&old=3462208&new=3494181
More onlineoptimisation vulnerabilities
- TI-2024-01192 Cross-site scripting in onlineoptimisation Email Encoder – Protect Email Addresses and… CVSS 3.1MEDIUM 6.4
- TI-2023-25929 WordPress Email Encoder Bundle Plugin <= 2.1.8 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1MEDIUM 6.5
- TI-2023-06466 Cross-site scripting in onlineoptimisation Email Encoder – Protect Email Addresses and… CVSS 3.1MEDIUM 6.4
- TI-2023-04698 Cross-site scripting in onlineoptimisation WP Mailto Links – Protect Email Addresses CVSS 3.1MEDIUM 6.4
- TI-2023-04243 Email Encoder <= 2.1.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode CVSS 3.1MEDIUM 6.4
- TI-2025-33409 WordPress WP Mailto Links Plugin <= 3.1.4 - Cross Site Scripting (XSS) Vulnerability CVSS 3.1MEDIUM 5.9
Sources
- CVE-2026-2840 · CVE Program
- CVE-2026-2840 · NVD
- FIRST EPSS
- GHSA-6f47-h5cp-7cwm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences