How severe is CVE-2021-21418?

CVE-2021-21418 has a CVSS 3.x base score of 4.6, 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-2021-21418 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21418?

CVE-2021-21418 affects Prestashop Ps Emailsubscription. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21418?

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

When was CVE-2021-21418 published?

CVE-2021-21418 was published on 2021-03-31 and last updated on 2026-06-17.

CVE-2021-21418

CVE-2021-21418 is a medium-severity vulnerability in Prestashop Ps Emailsubscription with a CVSS 3.x base score of 4.6. 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 4.6)
CVSS v2: 3.5
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Prestashop Ps Emailsubscription
Published: 2021-03-31
Last modified: 2026-06-17

Description

ps_emailsubscription is a newsletter subscription module for the PrestaShop platform. An employee can inject javascript in the newsletter condition field that will then be executed on the front office The issue has been fixed in 2.6.1

Frequently asked questions

What is CVE-2021-21418?: ps_emailsubscription is a newsletter subscription module for the PrestaShop platform. An employee can inject javascript in the newsletter condition field that will then be executed on the front office The issue has been fixed in 2.6.1
How severe is CVE-2021-21418?: CVE-2021-21418 has a CVSS 3.x base score of 4.6, 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-2021-21418 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21418?: CVE-2021-21418 affects Prestashop Ps Emailsubscription. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21418?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21418 published?: CVE-2021-21418 was published on 2021-03-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:prestashop:ps_emailsubscription:*:*:*:*:*:prestashop:*:*

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