CVE-2026-93756
Smash Balloon Social Post Feed <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
Description
The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML — including onerror handlers — is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator's session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution.
Timeline
ID reserved
By Wordfence
- 14 days later
· 14 days later
Published
- 1 day later
· 1 day later
Record updated
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 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | High7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (7 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: High 7.2.
Weakness
Affected products
smub · Smash Balloon Social Post Feed – Simple Social Feeds for WordPress
- affected ≤ 4.13.0
References (7)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a4a3bc4b-bc0c-47ac-9f60-e05b300311b4?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Integrations/CFF_Graph_Url.php#L76 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L805 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/builder/templates/preview/preview-components.php#L142 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/inc/Builder/CFF_Feed_Builder.php#L242 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/custom-facebook-feed/tags/4.12.0/admin/addon-functions.php#L142 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset/3720826/custom-facebook-feed/trunk/admin/builder/templates/preview/preview-components.php?old=3656491&old_path=custom-facebook-feed%2Ftrunk%2Fadmin%2Fbuilder%2Ftemplates%2Fpreview%2Fpreview-components.php (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)
- 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://trackcve.app/cve/CVE-2026-93756)Record last updated .