How severe is CVE-2021-25203?

CVE-2021-25203 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-25203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25203?

CVE-2021-25203 affects Victor Cms Project Victor Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25203?

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.

When was CVE-2021-25203 published?

CVE-2021-25203 was published on 2021-07-23 and last updated on 2026-06-17.

CVE-2021-25203

CVE-2021-25203 is a critical-severity vulnerability in Victor Cms Project Victor Cms with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Victor Cms Project Victor Cms
Published: 2021-07-23
Last modified: 2026-06-17

Description

Arbitrary file upload vulnerability in Victor CMS v 1.0 allows attackers to execute arbitrary code via the file upload to \CMSsite-master\admin\includes\admin_add_post.php.

Frequently asked questions

What is CVE-2021-25203?: Arbitrary file upload vulnerability in Victor CMS v 1.0 allows attackers to execute arbitrary code via the file upload to \CMSsite-master\admin\includes\admin_add_post.php.
How severe is CVE-2021-25203?: CVE-2021-25203 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-25203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25203?: CVE-2021-25203 affects Victor Cms Project Victor Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25203?: 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.
When was CVE-2021-25203 published?: CVE-2021-25203 was published on 2021-07-23 and last updated on 2026-06-17.

References

https://github.com/TCSWT/Victor-CMS/blob/main/README.md

Affected products (1)

cpe:2.3:a:victor_cms_project:victor_cms:1.0:*:*:*:*:*:*:*

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