What’s Vulnerable › Vulnerabilities

CVE-2021-24837: Passster < 3.5.5.8 - Contributor+ Stored Cross-Site Scripting

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-23 · updated 2026-06-17

Description

The Passster WordPress plugin before 3.5.5.8 does not escape the area parameter of its shortcode, which could allow users with a role as low as Contributor to perform Cross-Site Scripting attacks.

Affected products

• Passster Project Passter: before 3.5.5.8 — fixed in 3.5.5.8

How to fix

Upgrade to a fixed version: Passster Project Passter 3.5.5.8. Check the vendor advisory for mitigations.

References

• https://wpscan.com/vulnerability/5fea3ac3-d599-41f3-8f76-08f0d3552af1
• https://wpscan.com/vulnerability/5fea3ac3-d599-41f3-8f76-08f0d3552af1

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