CVE-2021-31707

CRITICALNVD 9.89.8—

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 85.2%
KEV: Not listed

Published

April 4, 2023

Last Modified

February 18, 2025

References (3)

cve@mitrehttps://github.com/Kitesky/KiteCMS/issues/8
nvd@nisthttps://vuldb.com/?id.224929
af854a3a-2127-422b-91ae-364da2661108https://github.com/Kitesky/KiteCMS/issues/8

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-434Unrestricted Upload of File with Dangerous Type

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 03:51 UTCEG score recompute
2026-05-25 03:51 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-31707?

CVE-2021-31707 is a critical vulnerability published on April 4, 2023. Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload file type.

When was CVE-2021-31707 disclosed?

CVE-2021-31707 was first published in the National Vulnerability Database on April 4, 2023, with the most recent update on February 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-31707 actively exploited?

CVE-2021-31707 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31707?

CVE-2021-31707 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-31707?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31707, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-31707

📅 Published

🔄 Last Modified

🔗 References (3)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-31707?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (3)

Frequently asked(5)

Related CVEs(same CWE)