How severe is CVE-2021-47778?

CVE-2021-47778 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-47778 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47778?

CVE-2021-47778 affects Get-simple Getsimplecms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47778?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2021-47778 have an EU (EUVD) identifier?

Yes. CVE-2021-47778 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3660.

When was CVE-2021-47778 published?

CVE-2021-47778 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2021-47778

CVE-2021-47778 is a high-severity vulnerability in Get-simple Getsimplecms with a CVSS 3.x base score of 7.2. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 8.6
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3660
Weakness: CWE-94
Affected product: Get-simple Getsimplecms
Published: 2026-01-21
Last modified: 2026-06-17

Description

GetSimple CMS My SMTP Contact Plugin 1.1.2 contains a PHP code injection vulnerability. An authenticated administrator can inject arbitrary PHP code through plugin configuration parameters, leading to remote code execution on the server.

Frequently asked questions

What is CVE-2021-47778?: GetSimple CMS My SMTP Contact Plugin 1.1.2 contains a PHP code injection vulnerability. An authenticated administrator can inject arbitrary PHP code through plugin configuration parameters, leading to remote code execution on the server.
How severe is CVE-2021-47778?: CVE-2021-47778 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-47778 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47778?: CVE-2021-47778 affects Get-simple Getsimplecms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47778?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2021-47778 have an EU (EUVD) identifier?: Yes. CVE-2021-47778 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3660.
When was CVE-2021-47778 published?: CVE-2021-47778 was published on 2026-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:get-simple:getsimplecms:1.1.2:*:*:*:*:*:*:*

More vulnerabilities in Get-simple Getsimplecms

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CVE-2021-47830 — Medium (CVSS 6.5): GetSimple CMS My SMTP Contact Plugin 1.1.1 contains a cross-site request forgery (CSRF) vulnerability. Attackers can…
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Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

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