How severe is CVE-2020-23839?

CVE-2020-23839 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-23839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23839?

CVE-2020-23839 affects Get-simple Getsimple Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23839?

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

When was CVE-2020-23839 published?

CVE-2020-23839 was published on 2020-09-01 and last updated on 2026-06-17.

CVE-2020-23839

CVE-2020-23839 is a medium-severity vulnerability in Get-simple Getsimple Cms with a CVSS 3.x base score of 6.1. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Get-simple Getsimple Cms
Published: 2020-09-01
Last modified: 2026-06-17

Description

A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.

Frequently asked questions

What is CVE-2020-23839?: A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.
How severe is CVE-2020-23839?: CVE-2020-23839 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-23839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23839?: CVE-2020-23839 affects Get-simple Getsimple Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-23839 published?: CVE-2020-23839 was published on 2020-09-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:get-simple:getsimple_cms:3.3.16:*:*:*:*:*:*:*

More vulnerabilities in Get-simple Getsimple Cms

CVE-2022-41544 — Critical (CVSS 9.8): GetSimple CMS v3.3.16 was discovered to contain a remote code execution (RCE) vulnerability via the edited_file…
CVE-2019-11231 — Critical (CVSS 9.8): An issue was discovered in GetSimple CMS through 3.3.15. insufficient input sanitation in the theme-edit.php file…
CVE-2018-17103 — High (CVSS 8.8): An issue was discovered in GetSimple CMS v3.3.13. There is a CSRF vulnerability that can change the administrator's…
CVE-2014-8722 — High (CVSS 7.5): GetSimple CMS 3.3.4 allows remote attackers to obtain sensitive information via a direct request to (1)…
CVE-2013-1420 — Medium (CVSS 6.1): Multiple cross-site scripting (XSS) vulnerabilities in GetSimple CMS before 3.2.1 allow remote attackers to inject…
CVE-2018-16325 — Medium (CVSS 6.1): There is XSS in GetSimple CMS 3.4.0.9 via the admin/edit.php title field.

All CVEs affecting Get-simple Getsimple Cms →

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