PostX — Gutenberg Blocks for Post Grid <= 2.4.9 - Authenticated (Contributor+) Stored Cross-Site Scripting
CVE-2021-24659Published · Updated Action summary
Affected: <2.4.10Update to 2.4.10 or newer
All remediation steps- Severity
- Medium5.4
- CVSS
- 5.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/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:RUser interaction- Required
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Post Grid Gutenberg Blocks – PostX ultimate-post
- Affected< 2.4.10
- Patched in2.4.10
Update to 2.4.10 or newer.
You are affected if you run < 2.4.10. Version 2.4.10 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Post Grid Gutenberg Blocks – PostX.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 2.4.10, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Post Grid Gutenberg Blocks – PostX to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to apple502j.
The PostX – Gutenberg Blocks for Post Grid WordPress plugin before 2.4.10 allows users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks via the plugin's block.
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 Post Grid Gutenberg Blocks – PostX
All 29| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via display_name User Field ≤5.1.0Update to 5.1.1 | CVE-2026-96840 | |
| Medium5.3 | Unauthenticated Information Exposure ≤5.0.40Update to 5.0.41 | CVE-2026-86783 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Post Comments Block ≤5.0.13Update to 5.0.14 | CVE-2026-5158 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'searchnoresult' Block Attribute ≤5.0.32Update to 5.0.33 | CVE-2026-15100 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'moreResultsText' Block Attribute ≤5.0.31Update to 5.0.32 | CVE-2026-13253 |
- High7.2Unauthenticated Stored Cross-Site Scripting via display_name User Field
≤5.1.0Update to 5.1.1
- Medium5.3Unauthenticated Information Exposure
≤5.0.40Update to 5.0.41
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Post Comments Block
≤5.0.13Update to 5.0.14
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'searchnoresult' Block Attribute
≤5.0.32Update to 5.0.33
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'moreResultsText' Block Attribute
≤5.0.31Update to 5.0.32
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 5.4
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.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.