CVE-2023-36299Network attack vector

Authenticated code execution via unrestricted file upload

Published Aug 3, 2023 · Updated Oct 17, 2024

Unrestricted file upload in Typecho 1.2.1 allows remote authenticated users to execute arbitrary code through crafted index.php parameters. Public records identify the index.php upload path and its upload and options-general values, but do not disclose the specific validation or storage operation that fails. A valid low-privilege account is required; successful exploitation runs attacker-supplied code with the web server process's privileges.

CVSS severity8.8
High
EPSS probability1.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Typecho 1.2.1 allows remote authenticated users to execute arbitrary code through crafted index.php parameters. Public records identify the index.php upload path and its upload and options-general values, but do not disclose the specific validation or storage operation that fails. A valid low-privilege account is required; successful exploitation runs attacker-supplied code with the web server process's privileges.

The record

CVE
CVE-2023-36299
Published
Aug 3, 2023
Updated
Oct 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

No public exploit references are available in this record.

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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