How severe is CVE-2020-15273?

CVE-2020-15273 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-15273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15273?

CVE-2020-15273 affects Basercms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15273?

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-2020-15273 published?

CVE-2020-15273 was published on 2020-10-30 and last updated on 2026-06-17.

CVE-2020-15273

CVE-2020-15273 is a high-severity vulnerability in Basercms with a CVSS 3.x base score of 7.3. 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: High (CVSS 3.x base score 7.3)
CVSS v2: 3.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Basercms
Published: 2020-10-30
Last modified: 2026-06-17

Description

baserCMS before version 4.4.1 is vulnerable to Cross-Site Scripting. The issue affects the following components: Edit feed settings, Edit widget area, Sub site new registration, New category registration. Arbitrary JavaScript may be executed by entering specific characters in the account that can access the file upload function category list, subsite setting list, widget area edit, and feed list on the management screen. The issue was introduced in version 4.0.0. It is fixed in version 4.4.1.

Frequently asked questions

What is CVE-2020-15273?: baserCMS before version 4.4.1 is vulnerable to Cross-Site Scripting. The issue affects the following components: Edit feed settings, Edit widget area, Sub site new registration, New category registration. Arbitrary JavaScript may be executed by entering specific characters in the account that can access the file upload function category list, subsite setting list, widget area edit, and feed list on the management screen. The issue was introduced in version 4.0.0. It is fixed in version 4.4.1.
How severe is CVE-2020-15273?: CVE-2020-15273 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-15273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15273?: CVE-2020-15273 affects Basercms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15273?: 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-2020-15273 published?: CVE-2020-15273 was published on 2020-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*

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