CVE-2021-31707: Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload f

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CRITICAL 9.8REMOTEMITIGATE

CVE-2021-31707 is a critical-severity flaw (CVSS 9.8) affecting kitecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-04-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kitesky

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-04 15:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

kitesky kitecms MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kitecms || rpm -q kitecms || kitecms --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-31707?

kitecms: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-31707 being exploited?

CVE-2021-31707 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-31707 affect?

CVE-2021-31707 affects kitecms. Severity is critical (CVSS 9.8). Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload file type.

How urgent is CVE-2021-31707?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-3267 HIGH 7.2 DOWNGRADE File Upload vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code via the up
CVE-2021-36546 HIGH 7.5 DOWNGRADE Incorrect Access Control issue discovered in KiteCMS 1.1 allows remote attackers to view sensitive information
CVE-2020-20522 MEDIUM 6.1 DOWNGRADE Cross Site Scripting vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code v
CVE-2020-20521 MEDIUM 6.1 DOWNGRADE Cross Site Scripting vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code v

References

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