How severe is CVE-2020-25557?

CVE-2020-25557 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-2020-25557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25557?

CVE-2020-25557 affects Cmsuno Project Cmsuno. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25557?

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-2020-25557 published?

CVE-2020-25557 was published on 2020-11-13 and last updated on 2026-06-17.

CVE-2020-25557

CVE-2020-25557 is a high-severity vulnerability in Cmsuno Project Cmsuno 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Cmsuno Project Cmsuno
Published: 2020-11-13
Last modified: 2026-06-17

Description

In CMSuno 1.6.2, an attacker can inject malicious PHP code as a "username" while changing his/her username & password. After that, when attacker logs in to the application, attacker's code will be run. As a result of this vulnerability, authenticated user can run command on the server.

Frequently asked questions

What is CVE-2020-25557?: In CMSuno 1.6.2, an attacker can inject malicious PHP code as a "username" while changing his/her username & password. After that, when attacker logs in to the application, attacker's code will be run. As a result of this vulnerability, authenticated user can run command on the server.
How severe is CVE-2020-25557?: CVE-2020-25557 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-2020-25557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25557?: CVE-2020-25557 affects Cmsuno Project Cmsuno. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25557?: 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-2020-25557 published?: CVE-2020-25557 was published on 2020-11-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cmsuno_project:cmsuno:1.6.2:*:*:*:*:*:*:*

More vulnerabilities in Cmsuno Project Cmsuno

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CVE-2020-25538 — High (CVSS 8.8): An authenticated attacker can inject malicious code into "lang" parameter in /uno/central.php file in CMSuno 1.6.2 and…
CVE-2020-15600 — Medium (CVSS 6.5): An issue was discovered in CMSUno before 1.6.1. uno.php allows CSRF to change the admin password.
CVE-2018-15567 — Medium (CVSS 6.1): CMSUno before 1.5.3 has XSS via the title field.
CVE-2021-36654 — Medium (CVSS 5.4): CMSuno 1.7 is vulnerable to an authenticated stored cross site scripting in modifying the filename parameter (tgo)…

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