How severe is CVE-2021-29400?

CVE-2021-29400 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-29400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29400?

CVE-2021-29400 affects Netexplorer My Smtp Contact. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-29400?

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

When was CVE-2021-29400 published?

CVE-2021-29400 was published on 2021-08-10 and last updated on 2026-06-17.

CVE-2021-29400

CVE-2021-29400 is a medium-severity vulnerability in Netexplorer My Smtp Contact with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Netexplorer My Smtp Contact
Published: 2021-08-10
Last modified: 2026-06-17

Description

A cross-site request forgery (CSRF) vulnerability in the My SMTP Contact v1.1.1 plugin for GetSimple CMS allows remote attackers to change the SMTP settings of the contact forms for the webpages of the CMS after an authenticated admin visits a malicious third-party site.

Frequently asked questions

What is CVE-2021-29400?: A cross-site request forgery (CSRF) vulnerability in the My SMTP Contact v1.1.1 plugin for GetSimple CMS allows remote attackers to change the SMTP settings of the contact forms for the webpages of the CMS after an authenticated admin visits a malicious third-party site.
How severe is CVE-2021-29400?: CVE-2021-29400 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-29400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29400?: CVE-2021-29400 affects Netexplorer My Smtp Contact. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-29400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29400 published?: CVE-2021-29400 was published on 2021-08-10 and last updated on 2026-06-17.

References

http://get-simple.info/extend/plugin/my-smtp-contact/1221/

Affected products (1)

cpe:2.3:a:netexplorer:my_smtp_contact:1.1.1:*:*:*:*:getsimple:*:*

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