How severe is CVE-2021-28999?

CVE-2021-28999 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28999?

CVE-2021-28999 affects Cmsmadesimple Cms Made Simple. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28999?

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.

When was CVE-2021-28999 published?

CVE-2021-28999 was published on 2023-05-08 and last updated on 2026-06-17.

CVE-2021-28999

CVE-2021-28999 is a high-severity vulnerability in Cmsmadesimple Cms Made Simple with a CVSS 3.x base score of 8.8. 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-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Cmsmadesimple Cms Made Simple
Published: 2023-05-08
Last modified: 2026-06-17

Description

SQL Injection vulnerability in CMS Made Simple through 2.2.15 allows remote attackers to execute arbitrary commands via the m1_sortby parameter to modules/News/function.admin_articlestab.php.

Frequently asked questions

What is CVE-2021-28999?: SQL Injection vulnerability in CMS Made Simple through 2.2.15 allows remote attackers to execute arbitrary commands via the m1_sortby parameter to modules/News/function.admin_articlestab.php.
How severe is CVE-2021-28999?: CVE-2021-28999 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28999?: CVE-2021-28999 affects Cmsmadesimple Cms Made Simple. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28999?: 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.
When was CVE-2021-28999 published?: CVE-2021-28999 was published on 2023-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cmsmadesimple:cms_made_simple:*:*:*:*:*:*:*:*

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