How severe is CVE-2018-20405?

CVE-2018-20405 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2018-20405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20405?

CVE-2018-20405 affects Bigtreecms Bigtree. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20405?

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

When was CVE-2018-20405 published?

CVE-2018-20405 was published on 2018-12-23 and last updated on 2026-06-17.

CVE-2018-20405

CVE-2018-20405 is a low-severity vulnerability in Bigtreecms Bigtree with a CVSS 3.x base score of 2.7. 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-639.

Key facts

Severity: Low (CVSS 3.x base score 2.7)
CVSS v2: 4.0
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Bigtreecms Bigtree
Published: 2018-12-23
Last modified: 2026-06-17

Description

BigTree 4.3 allows full path disclosure via authenticated admin/news/ input that triggers a syntax error. NOTE: This has been disputed with the following reasoning: "The issue reported requires full developer level access to the content management system where cross site scripting is not an issue -- you already have full control of the CMS including running arbitrary PHP.

Frequently asked questions

What is CVE-2018-20405?: BigTree 4.3 allows full path disclosure via authenticated admin/news/ input that triggers a syntax error. NOTE: This has been disputed with the following reasoning: "The issue reported requires full developer level access to the content management system where cross site scripting is not an issue -- you already have full control of the CMS including running arbitrary PHP.
How severe is CVE-2018-20405?: CVE-2018-20405 has a CVSS 3.x base score of 2.7, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2018-20405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20405?: CVE-2018-20405 affects Bigtreecms Bigtree. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20405?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20405 published?: CVE-2018-20405 was published on 2018-12-23 and last updated on 2026-06-17.

References

https://github.com/bigtreecms/BigTree-CMS/issues/354

Affected products (1)

cpe:2.3:a:bigtreecms:bigtree:4.3:*:*:*:*:*:*:*

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