What’s Vulnerable › Vulnerabilities

CVE-2021-3258

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-05 · updated 2026-06-17
• Weakness: CWE-79

Description

Question2Answer Q2A Ultimate SEO Version 1.3 is affected by cross-site scripting (XSS), which may lead to arbitrary remote code execution.

Affected products

• Qa-Themes Q2A Ultimate Seo: 1.3

References

• https://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536
• https://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/
• https://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-update
• https://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536
• https://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/
• https://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-update

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