CVE-2023-30333Public exploitNetwork attack vector

Authenticated code execution via path-traversing theme rename

Published May 18, 2023 · Updated Jan 23, 2025

Arbitrary file upload in PerfreeBlog 3.1.2 allows remote authenticated users to execute code through the theme editor. ThemeController accepts attacker-controlled file content, while its rename operation permits path traversal that moves the file outside the theme directory. Backend access is required; placing a cron entry executes commands with the service account's privileges.

CVSS severity9.8
Critical
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in PerfreeBlog 3.1.2 allows remote authenticated users to execute code through the theme editor. ThemeController accepts attacker-controlled file content, while its rename operation permits path traversal that moves the file outside the theme directory. Backend access is required; placing a cron entry executes commands with the service account's privileges.

The record

CVE
CVE-2023-30333
Published
May 18, 2023
Updated
Jan 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1053.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 2025Record 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1053.003Scheduled Task/Job: Cron

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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