How severe is CVE-2026-28495?

CVE-2026-28495 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28495 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28495?

CVE-2026-28495 affects Getsimple-ce Getsimple Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28495?

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

Does CVE-2026-28495 have an EU (EUVD) identifier?

Yes. CVE-2026-28495 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10811.

When was CVE-2026-28495 published?

CVE-2026-28495 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-28495

CVE-2026-28495 is a critical-severity vulnerability in Getsimple-ce Getsimple Cms with a CVSS 3.x base score of 9.6. 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-352.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10811
Weakness: CWE-352
Affected product: Getsimple-ce Getsimple Cms
Published: 2026-03-10
Last modified: 2026-06-17

Description

GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.

Frequently asked questions

What is CVE-2026-28495?: GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.
How severe is CVE-2026-28495?: CVE-2026-28495 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28495 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28495?: CVE-2026-28495 affects Getsimple-ce Getsimple Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28495?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-28495 have an EU (EUVD) identifier?: Yes. CVE-2026-28495 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10811.
When was CVE-2026-28495 published?: CVE-2026-28495 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-92wv-q2jp-qg88

Affected products (1)

cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:community:*:*:*

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