CVE-2021-3267: File Upload vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code via the up

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HIGH 7.2DOWNGRADE

CVE-2021-3267 is a high-severity flaw (CVSS 7.2) affecting kitecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

File Upload vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code via the uploadFile function.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
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 04:04 UTCUpdated Record last modified

kitesky kitecms DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison kitecms sudo apt install kitecms=<VERSION_BEFORE_1.1> sudo apt-mark hold kitecms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kitecms sudo dnf downgrade kitecms-<VERSION_BEFORE_1.1> sudo dnf versionlock add kitecms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-3267?

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

Is CVE-2021-3267 being exploited?

CVE-2021-3267 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-2021-3267 affect?

CVE-2021-3267 affects kitecms. Severity is high (CVSS 7.2). File Upload vulnerability found in KiteCMS v.1.1 allows a remote attacker to execute arbitrary code via the uploadFile function.

How urgent is CVE-2021-3267?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2022-28445 MEDIUM 6.5 DOWNGRADE KiteCMS v1.1.1 was discovered to contain an arbitrary file read vulnerability via the background management mo
CVE-2021-36546 HIGH 7.5 DOWNGRADE Incorrect Access Control issue discovered in KiteCMS 1.1 allows remote attackers to view sensitive information
CVE-2021-31707 CRITICAL 9.8 MITIGATE Permissions vulnerability found in KiteCMS allows a remote attacker to execute arbitrary code via the upload f
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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