How severe is CVE-2020-26048?

CVE-2020-26048 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-2020-26048 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-2020-26048?

CVE-2020-26048 affects Cuppacms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26048?

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-2020-26048 published?

CVE-2020-26048 was published on 2020-10-05 and last updated on 2026-06-17.

CVE-2020-26048

CVE-2020-26048 is a high-severity vulnerability in Cuppacms 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-434.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Cuppacms
Published: 2020-10-05
Last modified: 2026-06-17

Description

The file manager option in CuppaCMS before 2019-11-12 allows an authenticated attacker to upload a malicious file within an image extension and through a custom request using the rename function provided by the file manager is able to modify the image extension into PHP resulting in remote arbitrary code execution.

Frequently asked questions

What is CVE-2020-26048?: The file manager option in CuppaCMS before 2019-11-12 allows an authenticated attacker to upload a malicious file within an image extension and through a custom request using the rename function provided by the file manager is able to modify the image extension into PHP resulting in remote arbitrary code execution.
How severe is CVE-2020-26048?: CVE-2020-26048 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-2020-26048 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-2020-26048?: CVE-2020-26048 affects Cuppacms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26048?: 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-2020-26048 published?: CVE-2020-26048 was published on 2020-10-05 and last updated on 2026-06-17.

References

https://github.com/CuppaCMS/CuppaCMS/issues/7

Affected products (1)

cpe:2.3:a:cuppacms:cuppacms:*:*:*:*:*:*:*:*

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