Smash Balloon Social Post Feed <= 2.19.1 — Unauthenticated Stored Cross-Site Scripting
CVE-2021-24508Published · Updated Action summary
Affected: <2.19.2Update to 2.19.2 or newer
All remediation steps- Severity
- Medium6.1
- CVSS
- 6.1CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Smash Balloon Social Post Feed – Simple Social Feeds for WordPress custom-facebook-feed
- Affected< 2.19.2
- Patched in2.19.2
Update to 2.19.2 or newer.
You are affected if you run < 2.19.2. Version 2.19.2 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Smash Balloon Social Post Feed – Simple Social Feeds for WordPress.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 2.19.2, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Smash Balloon Social Post Feed – Simple Social Feeds for WordPress to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to dc11.
The Smash Balloon Social Post Feed WordPress plugin before 2.19.2 does not sanitise or escape the feedID POST parameter in its feed_locator AJAX action (available to both authenticated and unauthenticated users) before outputting a truncated version of it in the admin dashboard, leading to an unauthenticated Stored Cross-Site Scripting issue which will be executed in the context of a logged in administrator.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Smash Balloon Social Post Feed – Simple Social Feeds for WordPress
All 10| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview ≤4.13.0Update to 4.14.0 | CVE-2026-93756 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'id' Shortcode Attribute ≤4.9.0Update to 4.10.0 | CVE-2026-16775 | |
| Medium4.3 | Missing Authorization ≤4.3.2Update to 4.3.3 | CVE-2025-49937 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via `data-color` Attribute ≤4.3.1Update to 4.3.2 | CVE-2025-4577 | |
| Medium4.3 | Cross-Site Request Forgery ≤4.2.1Update to 4.2.2 | CVE-2024-31379 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview
≤4.13.0Update to 4.14.0
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'id' Shortcode Attribute
≤4.9.0Update to 4.10.0
- Medium4.3Missing Authorization
≤4.3.2Update to 4.3.3
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via `data-color` Attribute
≤4.3.1Update to 4.3.2
- Medium4.3Cross-Site Request Forgery
≤4.2.1Update to 4.2.2
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 6.1
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.