PatchTheCVECVE-2021-43408: The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection
CVE-2021-43408 is a medium-severity flaw (CVSS 6.5) affecting duplicate post. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be exploited to read, modify and delete SQL table data. In many cases it also possible to exploit features of SQL server to execute system commands and/or access the local file system. This particular vulnerabili
Why this priority
- EPSS top 5%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 9.7% (top 5%) |
| CISA exploited list | No |
| Weakness | CWE-89 |
| Published | 2021-11-19 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-43408?
duplicate post: upgrade to newer than 1.1.9. Exact commands for each OS are on this page.
Is CVE-2021-43408 being exploited?
CVE-2021-43408 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-43408 affect?
CVE-2021-43408 affects duplicate post. Severity is medium (CVSS 6.5). The "Duplicate Post" WordPress plugin up to and including version 1.1.9 is vulnerable to SQL Injection. SQL injection vulnerabilities occur when client supplied data is included within an SQL Query insecurely. SQL Injection can typically be
How urgent is CVE-2021-43408?
Priority 52/100. EPSS top 5%: very likely to be exploited; Public exploit reference
Software pages
WordPress vulnerabilities · Microsoft SQL Server vulnerabilities
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