How severe is CVE-2021-3258?

CVE-2021-3258 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-3258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3258?

CVE-2021-3258 affects Qa-themes Q2a Ultimate Seo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3258?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3258 published?

CVE-2021-3258 was published on 2021-02-05 and last updated on 2026-06-17.

CVE-2021-3258

CVE-2021-3258 is a medium-severity vulnerability in Qa-themes Q2a Ultimate Seo with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Qa-themes Q2a Ultimate Seo
Published: 2021-02-05
Last modified: 2026-06-17

Description

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

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 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-3258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3258?: CVE-2021-3258 affects Qa-themes Q2a Ultimate Seo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3258 published?: CVE-2021-3258 was published on 2021-02-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:qa-themes:q2a_ultimate_seo:1.3:*:*:*:*:question2answer:*:*

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