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CVE-2026-93756— Smash Balloon Social Post Feed <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview

Quick assessment

Affected
smub Smash Balloon Social Post Feed – Simple Social Feeds for WordPress
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件“Smash Balloon Social Post Feed”（一个简单的社交动态 feed 插件）在所有低于或等于 4.13.0 的版本中，存在存储型跨站脚本攻击（Stored XSS）漏洞。该漏洞源于对输入数据缺乏充分的 sanitization（净化）和输出时的 escaping（转义），攻击者可通过在关联的 Facebook 页面上发表评论消息，将恶意脚本注入到 Admin Builder 的预览页面中（利用 v-html 特性）。 由于缺乏输入验证和输出转义，未经认证的攻击者可以

CVSS 7.2 · High EPSS 0.27% · P17

Affected Version Matrix 1

VendorProduct Version RangeStatus
smub Smash Balloon Social Post Feed – Simple Social Feeds for WordPress ≤ 4.13.0 affected
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I. Basic Information for CVE-2026-93756

Vulnerability Information
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Vulnerability Title
Smash Balloon Social Post Feed <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
smub Smash Balloon Social Post Feed – Simple Social Feeds for WordPress 0 ~ 4.13.0 -

II. Public POCs for CVE-2026-93756

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III. Intelligence Information for CVE-2026-93756

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Patches & Fixes for CVE-2026-93756 (6)

Other References for CVE-2026-93756 (1)

IV. Related Vulnerabilities

Same product: Smash Balloon Social Post Feed – Simple Social Feeds for WordPress
Same vendor: smub
Same weakness: CWE-79

V. Comments for CVE-2026-93756

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