How severe is CVE-2021-41750?

CVE-2021-41750 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-41750 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41750?

CVE-2021-41750 affects Nystudio107 Seomatic. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41750?

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

When was CVE-2021-41750 published?

CVE-2021-41750 was published on 2022-06-12 and last updated on 2026-06-17.

CVE-2021-41750

CVE-2021-41750 is a medium-severity vulnerability in Nystudio107 Seomatic with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Nystudio107 Seomatic
Published: 2022-06-12
Last modified: 2026-06-17

Description

A cross-site scripting (XSS) vulnerability in the SEOmatic plugin 3.4.10 for Craft CMS 3 allows remote attackers to inject arbitrary web script via a GET to /index.php?action=seomatic/file/seo-file-link with url parameter containing the base64 encoded URL of a malicious web page / file and fileName parameter containing an arbitrary filename with the intended content-type to be rendered in the user's browser as the extension.

Frequently asked questions

What is CVE-2021-41750?: A cross-site scripting (XSS) vulnerability in the SEOmatic plugin 3.4.10 for Craft CMS 3 allows remote attackers to inject arbitrary web script via a GET to /index.php?action=seomatic/file/seo-file-link with url parameter containing the base64 encoded URL of a malicious web page / file and fileName parameter containing an arbitrary filename with the intended content-type to be rendered in the user's browser as the extension.
How severe is CVE-2021-41750?: CVE-2021-41750 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-41750 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41750?: CVE-2021-41750 affects Nystudio107 Seomatic. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41750?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41750 published?: CVE-2021-41750 was published on 2022-06-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nystudio107:seomatic:3.4.10:*:*:*:*:craft_cms:*:*

More vulnerabilities in Nystudio107 Seomatic

CVE-2021-41749 — Critical (CVSS 9.8): In the SEOmatic plugin up to 3.4.11 for Craft CMS 3, it is possible for unauthenticated attackers to perform a…
CVE-2021-44618 — Critical (CVSS 9.8): A Server-side Template Injection (SSTI) vulnerability exists in Nystudio107 Seomatic 3.4.12 in…
CVE-2020-12790 — High (CVSS 7.5): In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This…
CVE-2018-14716 — High (CVSS 7.5): A Server Side Template Injection (SSTI) was discovered in the SEOmatic plugin before 3.1.4 for Craft CMS, because…

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