How severe is CVE-2020-26669?

CVE-2020-26669 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-26669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26669?

CVE-2020-26669 affects Bigtreecms Bigtree Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26669?

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

When was CVE-2020-26669 published?

CVE-2020-26669 was published on 2021-06-01 and last updated on 2026-06-17.

CVE-2020-26669

CVE-2020-26669 is a medium-severity vulnerability in Bigtreecms Bigtree Cms with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Bigtreecms Bigtree Cms
Published: 2021-06-01
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability was discovered in BigTree CMS 4.4.10 and earlier which allows an authenticated attacker to execute arbitrary web scripts or HTML via the page content to site/index.php/admin/pages/update.

Frequently asked questions

What is CVE-2020-26669?: A stored cross-site scripting (XSS) vulnerability was discovered in BigTree CMS 4.4.10 and earlier which allows an authenticated attacker to execute arbitrary web scripts or HTML via the page content to site/index.php/admin/pages/update.
How severe is CVE-2020-26669?: CVE-2020-26669 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-26669 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26669?: CVE-2020-26669 affects Bigtreecms Bigtree Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26669?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-26669 published?: CVE-2020-26669 was published on 2021-06-01 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/48831

Affected products (1)

cpe:2.3:a:bigtreecms:bigtree_cms:*:*:*:*:*:*:*:*

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