CVE-2021-31731Public exploitNetwork attack vector

Authenticated code execution via template path traversal

Published Aug 12, 2021 · Updated Aug 3, 2024

Directory traversal in KiteCMS 1.1.1 allows remote authenticated users to overwrite arbitrary server files through the template editor. The Template.php fileedit() method joins the user-controlled path to the site root without blocking ../ sequences, then writes decoded html content to the resulting file. Administrator access to the web interface is required; overwriting a PHP entry point grants arbitrary server-side code execution.

CVSS severity6.5
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in KiteCMS 1.1.1 allows remote authenticated users to overwrite arbitrary server files through the template editor. The Template.php fileedit() method joins the user-controlled path to the site root without blocking ../ sequences, then writes decoded html content to the resulting file. Administrator access to the web interface is required; overwriting a PHP entry point grants arbitrary server-side code execution.

The record

CVE
CVE-2021-31731
Published
Aug 12, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
5.5NVDAV:N/AC:L/Au:S/C:N/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1505.003Server Software Component: Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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