Bricksforge <= 3.1.8.9 — Unauthenticated Arbitrary File Upload via 'temporaryFileUploads' Parameter
CVE-2026-85097Published · Updated Action summary
Affected: ≤3.1.8.9Update to 3.1.8.10 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-434 Arbitrary File Upload
- Required access
- No account needed
- Exploit prediction (EPSS)
- 3.3% chance in 30 days88th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
Bricksforge bricksforge
- Affected≤ 3.1.8.9
- Patched in3.1.8.10
Update to 3.1.8.10 or newer.
You are affected if you run ≤ 3.1.8.9. Version 3.1.8.10 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Bricksforge.
- 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 3.1.8.10, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Bricksforge to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to d.v4n_s3c.
The Bricksforge plugin for WordPress is vulnerable to unauthenticated arbitrary file upload in versions up to, and including, 3.1.8.9. This is due to insufficient validation of the attacker-controlled URL field in the 'temporaryFileUploads' parameter during form submission. An unauthenticated attacker can first obtain a valid nonce via the bricksforge_regenerate_nonce AJAX endpoint, then upload a GIF/PHP polyglot file to the temporary upload directory where MIME type validation is correctly performed. Subsequently, the attacker can submit a form with a crafted 'temporaryFileUploads' parameter where the server-side file path points to the validated GIF file, but the attacker-controlled url field ends with a .php extension. This makes it possible for unauthenticated attackers to upload and execute arbitrary PHP code on the server.
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 Bricksforge
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.3 | Authenticated (Subscriber+) Privilege Escalation ≤3.1.8.8Update to 3.1.8.9 | CVE-2026-84814 | |
| Critical9.8 | Unauthenticated Privilege Escalation via Password Reset ≤3.1.8.7Update to 3.1.8.8 | CVE-2026-18030 | |
| Critical9.8 | Unauthenticated Privilege Escalation via Pro Forms fieldIds Parameter ≤3.1.8.6Update to 3.1.8.7 | CVE-2026-14956 | |
| Medium5.3 | Unauthenticated Information Exposure ≤3.1.8.4Update to 3.1.8.5 | CVE-2026-34888 | |
| Medium5.3 | Missing Authorization to Unauthenticated WordPress Settings Deletion ≤2.0.17Update to 2.1.1 | CVE-2024-31243 |
- Medium6.3Authenticated (Subscriber+) Privilege Escalation
≤3.1.8.8Update to 3.1.8.9
- Critical9.8Unauthenticated Privilege Escalation via Password Reset
≤3.1.8.7Update to 3.1.8.8
- Critical9.8Unauthenticated Privilege Escalation via Pro Forms fieldIds Parameter
≤3.1.8.6Update to 3.1.8.7
- Medium5.3Unauthenticated Information Exposure
≤3.1.8.4Update to 3.1.8.5
- Medium5.3Missing Authorization to Unauthenticated WordPress Settings Deletion
≤2.0.17Update to 2.1.1
Same weakness (Arbitrary File Upload)
All Arbitrary File Upload| 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 critical, CVSS 9.8
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.