What’s Vulnerable › Vulnerabilities

CVE-2023-0147: Flexible Captcha <= 4.1 - Contributor+ Stored XSS

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-02-06 · updated 2026-06-17

Description

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

Affected products

• Flexible Captcha: through 4.1

References

• https://wpscan.com/vulnerability/af9cbb4a-42fc-43c5-88f3-349b417f1a6a
• https://wpscan.com/vulnerability/af9cbb4a-42fc-43c5-88f3-349b417f1a6a

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