Smart Post <= 4.0.9 — Authenticated (Subscriber+) Stored Cross-Site Scripting via User display_name via Author Filter block
CVE-2026-119160Published · Updated Action summary
Affected: ≤4.0.9Update to 4.0.10 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- Unknown
- Exploit prediction (EPSS)
- 0.2% chance in 30 days14th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News post-carousel
- Affected≤ 4.0.9
- Patched in4.0.10
Update to 4.0.10 or newer.
You are affected if you run ≤ 4.0.9. Version 4.0.10 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.0.10, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Jacek Sowiński (dzaku).
The Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name' parameter in all versions up to, and including, 4.0.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the victim page to contain an Author Filter block alongside a grid or live-filter block, and execution is triggered by a visitor clicking the attacker's author entry in the dropdown — a standard filter interaction requiring no elevated privileges from the victim.
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 Smart Post – Post Grid, Post Carousel, Post Slider Gutenberg Blocks for Blog & News
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | 4.0.7 - Authenticated (Contributor+) Insecure Direct Object Reference 4.0.0 – 4.0.7Update to 4.0.8 | CVE-2026-78150 | |
| Medium5.3 | 4.0.7 - Unauthenticated Password-Protected Post Content Disclosure 4.0.0 – 4.0.7Update to 4.0.8 | CVE-2026-78149 | |
| High7.2 | Authenticated (Administrator+) PHP Object Injection ≤3.0.12Update to 3.0.13 | CVE-2026-3017 | |
| Medium5.5 | Authenticated (Editor+) Stored Cross-Site Scripting via Pagination Color ≤3.0.0Update to 3.0.1 | CVE-2024-8187 | |
| Medium4.4 | Authenticated (Editor+) Stored Cross-Site Scripting ≤2.4.27Update to 2.4.28 | CVE-2024-3996 |
- Medium4.34.0.7 - Authenticated (Contributor+) Insecure Direct Object Reference
4.0.0 – 4.0.7Update to 4.0.8
- Medium5.34.0.7 - Unauthenticated Password-Protected Post Content Disclosure
4.0.0 – 4.0.7Update to 4.0.8
- High7.2Authenticated (Administrator+) PHP Object Injection
≤3.0.12Update to 3.0.13
- Medium5.5Authenticated (Editor+) Stored Cross-Site Scripting via Pagination Color
≤3.0.0Update to 3.0.1
- Medium4.4Authenticated (Editor+) Stored Cross-Site Scripting
≤2.4.27Update to 2.4.28
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 6.4
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.
- EPSS
- Exploit Prediction Scoring System by FIRST.org.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.