How severe is CVE-2021-43574?

CVE-2021-43574 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-2021-43574 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43574?

CVE-2021-43574 affects Atmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43574?

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

When was CVE-2021-43574 published?

CVE-2021-43574 was published on 2021-11-15 and last updated on 2026-06-17.

CVE-2021-43574

CVE-2021-43574 is a medium-severity vulnerability in Atmail 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% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Atmail
Published: 2021-11-15
Last modified: 2026-06-17

Description

WebAdmin Control Panel in Atmail 6.5.0 (a version released in 2012) allows XSS via the format parameter to the default URI. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Frequently asked questions

What is CVE-2021-43574?: WebAdmin Control Panel in Atmail 6.5.0 (a version released in 2012) allows XSS via the format parameter to the default URI. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
How severe is CVE-2021-43574?: CVE-2021-43574 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-2021-43574 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43574?: CVE-2021-43574 affects Atmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43574?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43574 published?: CVE-2021-43574 was published on 2021-11-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:atmail:atmail:6.5.0:*:*:*:*:*:*:*

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CVE-2013-5031 — Critical (CVSS 10.0): Unspecified vulnerability in Atmail before 6.6.4, and 7.x before 7.1.2, has unknown impact and attack vectors, a…
CVE-2024-24133 — Critical (CVSS 9.8): Atmail v6.6.0 was discovered to contain a SQL injection vulnerability via the username parameter on the login page.
CVE-2017-9519 — High (CVSS 8.8): atmail before 7.8.0.2 has CSRF, allowing an attacker to create a user account.

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