CVE-2026-4131WP Responsive Popup + Optin <= 1.4 - Cross-Site Request Forgery to Stored Cross-Site Scripting via 'wpo_image_url' Parameter
- 6.1MediumCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The WP Responsive Popup + Optin plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 1.4. This is due to the settings form on the admin page (wpo_admin_page.php) lacking nonce generation (wp_nonce_field) and verification (wp_verify_nonce/check_admin_referer). This makes it possible for unauthenticated attackers to update all plugin settings including the 'wpo_image_url' parameter via a forged request, granted they can trick a site administrator into performing an action such as clicking a link.
Timeline
ID reserved
By Wordfence
- 40 days later
· 40 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
sphex1987 · WP Responsive Popup + Optin
- affected ≤ 1.4
References
References11
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0a8a49c4-21e8-447c-94da-8241c7d66c29?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/trunk/wpo_admin_page.php#L103 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/tags/1.4/wpo_admin_page.php#L103 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/trunk/wpo_admin_page.php#L104 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/tags/1.4/wpo_admin_page.php#L104 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/trunk/wp-popup-optin.php#L218 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/tags/1.4/wp-popup-optin.php#L218 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/trunk/wpo_admin_page.php#L15 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/tags/1.4/wpo_admin_page.php#L15 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/trunk/wpo_admin_page.php#L43 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/wp-popup-optin/tags/1.4/wpo_admin_page.php#L43 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-24672 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-4131)Record last updated .