PatchTheCVECVE-2023-0147: The Flexible Captcha WordPress plugin through 4.1 does not validate and escape some of its shortcode attribute
CVE-2023-0147 is a medium-severity flaw (CVSS 5.4) affecting flexible captcha. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The Flexible Captcha WordPress plugin through 4.1 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 51%) |
| CISA exploited list | No |
| Published | 2023-02-06 |
| 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-2023-0147?
flexible captcha: upgrade to newer than 4.1. Exact commands for each OS are on this page.
Is CVE-2023-0147 being exploited?
CVE-2023-0147 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-2023-0147 affect?
CVE-2023-0147 affects flexible captcha. Severity is medium (CVSS 5.4). The Flexible Captcha WordPress plugin through 4.1 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and a
How urgent is CVE-2023-0147?
Priority 36/100. Public exploit reference