What’s Vulnerable › Vulnerabilities

CVE-2021-24817: Ultimate NoFollow <= 1.4.8 - Contributor+ Stored Cross-Site Scripting

• 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: 2021-12-13 · updated 2026-06-17
• Weakness: CWE-79

Description

The Ultimate NoFollow WordPress plugin through 1.4.8 does not sanitise and escape the href attribute of its shortcodes, allowing users with a role as low as contributor to perform Cross-Site Scripting attacks

Affected products

• Ultimate Nofollow: through 1.4.8

References

• https://wpscan.com/vulnerability/ccb27d2e-2d2a-40d3-ba7e-bcd5e5012a9a
• https://wpscan.com/vulnerability/ccb27d2e-2d2a-40d3-ba7e-bcd5e5012a9a

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