What’s Vulnerable › Vulnerabilities

CVE-2021-24897: Add Subtitle <= 1.1.0 - 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: 2022-03-14 · updated 2026-06-17
• Weakness: CWE-79

Description

The Add Subtitle WordPress plugin through 1.1.0 does not sanitise or escape the sub-title field (available only with classic editor) when output in the page, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks

Affected products

• Add Subtitle: through 1.1.0

References

• https://wpscan.com/vulnerability/a0dd1da8-f8d2-453d-a2f2-711a49fb6466
• https://wpscan.com/vulnerability/a0dd1da8-f8d2-453d-a2f2-711a49fb6466

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