How severe is CVE-2020-26167?

CVE-2020-26167 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-2020-26167 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26167?

CVE-2020-26167 affects Thedaylightstudio Fuel Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26167?

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-2020-26167 published?

CVE-2020-26167 was published on 2020-11-04 and last updated on 2026-06-17.

CVE-2020-26167

CVE-2020-26167 is a critical-severity vulnerability in Thedaylightstudio Fuel 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Thedaylightstudio Fuel Cms
Published: 2020-11-04
Last modified: 2026-06-17

Description

In FUEL CMS 11.4.12 and before, the page preview feature allows an anonymous user to take complete ownership of any account including an administrator one.

Frequently asked questions

What is CVE-2020-26167?: In FUEL CMS 11.4.12 and before, the page preview feature allows an anonymous user to take complete ownership of any account including an administrator one.
How severe is CVE-2020-26167?: CVE-2020-26167 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-2020-26167 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26167?: CVE-2020-26167 affects Thedaylightstudio Fuel Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26167?: 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-2020-26167 published?: CVE-2020-26167 was published on 2020-11-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:thedaylightstudio:fuel_cms:*:*:*:*:*:*:*:*

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