CVE-2026-13295 json
Page Builder by SiteOrigin <= 2.34.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via panels_data Parameter
published 2026-06-27 4 mo ago modified 2026-06-29 4 mo ago also EUVD-2026-39955
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
The Page Builder by SiteOrigin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via panels_data Parameter in all versions up to, and including, 2.34.3 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. This is possible because the nonce and edit_post capability checks enforced during save are both satisfied by Contributor-level users for their own posts, and the panels_data value is stored as post meta — outside the scope of WordPress's unfiltered_html carve-out — meaning no wp_kses fallback prevents the unsanitized WP_Widget_Custom_HTML content from being persisted and later rendered verbatim on the frontend.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- gpriday Page Builder by SiteOrigin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/7830b3dc-7d20-4516-b4d6-57636ca773e9?source=cve
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.3/inc/admin.php#L1085
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.3/inc/admin.php#L236
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.3/inc/admin.php#L254
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.3/inc/renderer.php#L950
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.1/inc/admin.php#L1085
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.1/inc/admin.php#L236
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.1/inc/admin.php#L254
- plugins.trac.wordpress.org /browser/siteorigin-panels/tags/2.34.1/inc/renderer.php#L950
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3585987%40siteorigin-panels&new=3585987%40siteorigin-panels&sfp
Sources
- CVE List CVE-2026-13295
- NVD CVE-2026-13295
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.