What’s Vulnerable › Vulnerabilities

CVE-2023-0491: Schedulicity - Easy Online Scheduling <= 2.21 - 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: 2023-03-27 · updated 2026-06-17

Description

The Schedulicity WordPress plugin through 2.21 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

• Schedulicity: through 2.2.1

References

• https://wpscan.com/vulnerability/b1a7e8fc-ffcf-493b-9f2d-ffa5d2348b60
• https://wpscan.com/vulnerability/b1a7e8fc-ffcf-493b-9f2d-ffa5d2348b60

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