How severe is CVE-2020-21431?

CVE-2020-21431 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-21431 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21431?

CVE-2020-21431 affects Hongcms Project Hongcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-21431?

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

When was CVE-2020-21431 published?

CVE-2020-21431 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2020-21431

CVE-2020-21431 is a medium-severity vulnerability in Hongcms Project Hongcms with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 5.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hongcms Project Hongcms
Published: 2021-10-04
Last modified: 2026-06-17

Description

HongCMS v3.0 contains an arbitrary file read and write vulnerability in the component /admin/index.php/template/edit.

Frequently asked questions

What is CVE-2020-21431?: HongCMS v3.0 contains an arbitrary file read and write vulnerability in the component /admin/index.php/template/edit.
How severe is CVE-2020-21431?: CVE-2020-21431 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-21431 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21431?: CVE-2020-21431 affects Hongcms Project Hongcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-21431?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-21431 published?: CVE-2020-21431 was published on 2021-10-04 and last updated on 2026-06-17.

References

https://github.com/Neeke/HongCMS/issues/14

Affected products (1)

cpe:2.3:a:hongcms_project:hongcms:3.0.0:*:*:*:*:*:*:*

More vulnerabilities in Hongcms Project Hongcms

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CVE-2018-10265 — High (CVSS 8.8): An issue was discovered in HongCMS v3.0.0. There is a CSRF vulnerability that can add an administrator account via the…
CVE-2022-28523 — High (CVSS 8.1): HongCMS 3.0.0 allows arbitrary file deletion via the component /admin/index.php/template/ajax?action=delete.
CVE-2018-16774 — High (CVSS 7.5): HongCMS 3.0.0 allows arbitrary file deletion via a ../ in the file parameter to…
CVE-2022-32412 — High (CVSS 7.2): An issue in the /template/edit component of HongCMS v3.0 allows attackers to getshell.

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