How severe is CVE-2021-24640?

CVE-2021-24640 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-2021-24640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24640?

CVE-2021-24640 affects Gutenslider. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24640?

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

When was CVE-2021-24640 published?

CVE-2021-24640 was published on 2021-09-20 and last updated on 2026-06-17.

CVE-2021-24640

CVE-2021-24640 is a medium-severity vulnerability in Gutenslider 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: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Gutenslider
Published: 2021-09-20
Last modified: 2026-06-17

Description

The WordPress Slider Block Gutenslider plugin before 5.2.0 does not escape the minWidth attribute of a Gutenburg block, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks

Frequently asked questions

What is CVE-2021-24640?: The WordPress Slider Block Gutenslider plugin before 5.2.0 does not escape the minWidth attribute of a Gutenburg block, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks
How severe is CVE-2021-24640?: CVE-2021-24640 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-2021-24640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24640?: CVE-2021-24640 affects Gutenslider. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24640 published?: CVE-2021-24640 was published on 2021-09-20 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/e61dd498-5d0e-45ce-b660-a36c576f8d78

Affected products (1)

cpe:2.3:a:gutenslider:gutenslider:*:*:*:*:*:wordpress:*:*

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