How severe is CVE-2021-31707?

CVE-2021-31707 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31707 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31707?

CVE-2021-31707 affects Kitesky Kitecms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31707?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-31707 published?

CVE-2021-31707 was published on 2023-04-04 and last updated on 2026-06-17.

CVE-2021-31707

CVE-2021-31707 is a critical-severity vulnerability in Kitesky Kitecms with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Kitesky Kitecms
Published: 2023-04-04
Last modified: 2026-06-17

Description

Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload file type.

Frequently asked questions

What is CVE-2021-31707?: Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload file type.
How severe is CVE-2021-31707?: CVE-2021-31707 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31707 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31707?: CVE-2021-31707 affects Kitesky Kitecms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31707?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-31707 published?: CVE-2021-31707 was published on 2023-04-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kitesky:kitecms:-:*:*:*:*:*:*:*

More vulnerabilities in Kitesky Kitecms

CVE-2020-20671 — High (CVSS 8.8): A cross-site request forgery (CSRF) in KiteCMS V1.1 allows attackers to arbitrarily add an administrator account.
CVE-2020-20672 — High (CVSS 7.8): An arbitrary file upload vulnerability in /admin/upload/uploadfile of KiteCMS V1.1 allows attackers to getshell via a…
CVE-2021-36546 — High (CVSS 7.5): Incorrect Access Control issue discovered in KiteCMS 1.1 allows remote attackers to view sensitive information via path…
CVE-2021-3267 — High (CVSS 7.2): File Upload vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code via the uploadFile…
CVE-2022-28445 — Medium (CVSS 6.5): KiteCMS v1.1.1 was discovered to contain an arbitrary file read vulnerability via the background management module.
CVE-2021-31731 — Medium (CVSS 6.5): A directory traversal issue in KiteCMS 1.1.1 allows remote administrators to overwrite arbitrary files via ../ in the…

All CVEs affecting Kitesky Kitecms →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →