How severe is CVE-2021-25856?

CVE-2021-25856 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-25856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25856?

CVE-2021-25856 affects Supermicro-cms Project Supermicro-cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25856?

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

When was CVE-2021-25856 published?

CVE-2021-25856 was published on 2023-08-11 and last updated on 2026-06-17.

CVE-2021-25856

CVE-2021-25856 is a medium-severity vulnerability in Supermicro-cms Project Supermicro-cms with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Supermicro-cms Project Supermicro-cms
Published: 2023-08-11
Last modified: 2026-06-17

Description

An issue was discovered in pcmt superMicro-CMS version 3.11, allows attackers to delete files via crafted image file in images.php.

Frequently asked questions

What is CVE-2021-25856?: An issue was discovered in pcmt superMicro-CMS version 3.11, allows attackers to delete files via crafted image file in images.php.
How severe is CVE-2021-25856?: CVE-2021-25856 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-25856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25856?: CVE-2021-25856 affects Supermicro-cms Project Supermicro-cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-25856 published?: CVE-2021-25856 was published on 2023-08-11 and last updated on 2026-06-17.

References

https://github.com/pcmt/superMicro-CMS/issues/1

Affected products (1)

cpe:2.3:a:supermicro-cms_project:supermicro-cms:3.11:*:*:*:*:*:*:*

More vulnerabilities in Supermicro-cms Project Supermicro-cms

CVE-2021-25857 — High (CVSS 7.2): An issue was discovered in pcmt superMicro-CMS version 3.11, allows authenticated attackers to execute arbitrary code…

All CVEs affecting Supermicro-cms Project Supermicro-cms →