How severe is CVE-2021-24495?

CVE-2021-24495 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-2021-24495 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24495?

CVE-2021-24495 affects Marmoset Marmoset Viewer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24495?

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

When was CVE-2021-24495 published?

CVE-2021-24495 was published on 2021-08-09 and last updated on 2026-06-17.

CVE-2021-24495

CVE-2021-24495 is a medium-severity vulnerability in Marmoset Marmoset Viewer 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: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Marmoset Marmoset Viewer
Published: 2021-08-09
Last modified: 2026-06-17

Description

The Marmoset Viewer WordPress plugin before 1.9.3 does not property sanitize, validate or escape the 'id' parameter before outputting back in the page, leading to a reflected Cross-Site Scripting issue.

Frequently asked questions

What is CVE-2021-24495?: The Marmoset Viewer WordPress plugin before 1.9.3 does not property sanitize, validate or escape the 'id' parameter before outputting back in the page, leading to a reflected Cross-Site Scripting issue.
How severe is CVE-2021-24495?: CVE-2021-24495 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-2021-24495 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24495?: CVE-2021-24495 affects Marmoset Marmoset Viewer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24495?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24495 published?: CVE-2021-24495 was published on 2021-08-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:marmoset:marmoset_viewer:*:*:*:*:*:wordpress:*:*

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