How severe is CVE-2021-40973?

CVE-2021-40973 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-2021-40973 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40973?

CVE-2021-40973 affects Spotweb Project Spotweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40973?

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

When was CVE-2021-40973 published?

CVE-2021-40973 was published on 2021-10-01 and last updated on 2026-06-17.

CVE-2021-40973

CVE-2021-40973 is a medium-severity vulnerability in Spotweb Project Spotweb 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: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Spotweb Project Spotweb
Published: 2021-10-01
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in templates/installer/step-004.inc.php in spotweb 1.5.1 and below allow remote attackers to inject arbitrary web script or HTML via the lastname parameter.

Frequently asked questions

What is CVE-2021-40973?: Cross-site scripting (XSS) vulnerability in templates/installer/step-004.inc.php in spotweb 1.5.1 and below allow remote attackers to inject arbitrary web script or HTML via the lastname parameter.
How severe is CVE-2021-40973?: CVE-2021-40973 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-2021-40973 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40973?: CVE-2021-40973 affects Spotweb Project Spotweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40973?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40973 published?: CVE-2021-40973 was published on 2021-10-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:spotweb_project:spotweb:*:*:*:*:*:*:*:*

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CVE-2021-40972 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in templates/installer/step-004.inc.php in spotweb 1.5.1 and below allow…
CVE-2021-40971 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in templates/installer/step-004.inc.php in spotweb 1.5.1 and below allow…
CVE-2021-40970 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in templates/installer/step-004.inc.php in spotweb 1.5.1 and below allow…

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