CVE-2021-3258
MEDIUMCVSS 5.4/10EPSS 1.64%
Last modified
CVE-2021-3258 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Question2Answer Q2A Ultimate SEO Version 1.3 is affected by cross-site scripting (XSS), which may lead to arbitrary remote code execution.. EPSS estimates a 1.64% chance of exploitation in the next 30 days.
Description
Question2Answer Q2A Ultimate SEO Version 1.3 is affected by cross-site scripting (XSS), which may lead to arbitrary remote code execution.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Qa-Themes | Q2a Ultimate Seo | 1.3 |
References
- https://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536Patch, Third Party Advisory
- https://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/Exploit, Third Party Advisory
- https://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-updateRelease Notes, Vendor Advisory
- https://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536Patch, Third Party Advisory
- https://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/Exploit, Third Party Advisory
- https://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-updateRelease Notes, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3258?
Question2Answer Q2A Ultimate SEO Version 1.3 is affected by cross-site scripting (XSS), which may lead to arbitrary remote code execution.
How severe is CVE-2021-3258?
CVE-2021-3258 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3258?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3258?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST