Ultimate Member < 1.0.84 — Authorization Bypass to Arbitrary File Upload/Delete
0ae243af-619f-4405-b1e0-9b44c1869501Published · Updated Action summary
Affected: <1.0.84Update to 1.0.84 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-862 Missing Authorization
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin ultimate-member
- Affected< 1.0.84
- Patched in1.0.84
Update to 1.0.84 or newer.
You are affected if you run < 1.0.84. Version 1.0.84 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin.
- 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 1.0.84, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to James Golovich.
The Ultimate Member plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the ultimatemember_remove_file() function in versions up to, and including, 1.0.83. This makes it possible for unauthenticated attackers to delete or upload arbitrary files.
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 Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
All 87| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting via Custom Textarea Profile Field ≤2.14.1Update to 2.14.2 | CVE-2026-116621 | |
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting via 'user_url' Profile Field ≤2.14.0Update to 2.14.1 | CVE-2026-107625 | |
| High8.1 | Unauthenticated PHP Object Injection ≤2.13.1Update to 2.14.0 | CVE-2026-115968 | |
| High7.5 | Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass ≤2.13.1Update to 2.14.0 | CVE-2026-93428 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via 'form_id' Parameter ≤2.13.1Update to 2.14.0 | CVE-2026-96270 |
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via Custom Textarea Profile Field
≤2.14.1Update to 2.14.2
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via 'user_url' Profile Field
≤2.14.0Update to 2.14.1
- High8.1Unauthenticated PHP Object Injection
≤2.13.1Update to 2.14.0
- High7.5Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass
≤2.13.1Update to 2.14.0
- High7.2Unauthenticated Stored Cross-Site Scripting via 'form_id' Parameter
≤2.13.1Update to 2.14.0
Same weakness (Missing Authorization)
All Missing Authorization| 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
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Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- 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.