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WordPress plugin

Backup by Supsystic <= 2.3.11 — Cross-Site Request Forgery to Arbitrary File Download/Deletion

7934c73c-17cf-4cec-a8da-654cee453b8fPublished · Updated

Action summary

Affected: ≤2.3.11Update to 2.3.12 or newer

All remediation steps
Watch plugin
Severity
High8.1
CVSS
8.1
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:R User interaction
Required
S:U Scope
Unchanged
C:H Confidentiality
High
I:N Integrity
None
A:H Availability
High
Weakness
CWE-352 CSRF
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Backup by Supsystic backup-by-supsystic

  1. Affected≤ 2.3.11
  2. Patched in2.3.12

Update to 2.3.12 or newer.

You are affected if you run ≤ 2.3.11. Version 2.3.12 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Backup by Supsystic.
  • 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

  1. Update to version 2.3.12, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Backup by Supsystic to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Erik David Martin.

The Backup by Supsystic plugin for WordPress is vulnerable to Arbitrary File Download and Deletion in versions up to, and including, 2.3.11. This is due to various path traversal attacks and missing CSRF checks. This makes it possible for authenticated Admin+ attackers to download and delete any file on the vulnerable server and also allows unauthenticated attackers to delete files.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Backup by Supsystic

All 2
More vulnerabilities in Backup by Supsystic
SeverityVulnerabilityCVEPublished
High8.1Unauthenticated Local File Inclusion
≤2.3.9No patch available
CVE-2020-37246

Same weakness (CSRF)

All CSRF
Other CSRF vulnerabilities
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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
CVE-2026-120688
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
CVE-2026-125055
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
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity high, CVSS 8.1

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. [object Object] 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.

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