CVE-2026-5344Network attack vector

Authenticated arbitrary file write via upload path traversal

Published Apr 2, 2026 · Updated Apr 2, 2026

Path traversal in Textpattern CMS 4.9.0 through 4.9.1 allows remote authenticated users to write files via XML-RPC image uploads. The mt_uploadImage function in rpc/TXP_RPCServer.php accepts the attacker-controlled file.name value as an upload path without confining it to the image directory. Low-privileged access and the optional XML-RPC server are required; successful requests can overwrite files reachable by the web-server account.

CVSS severity6.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Textpattern CMS 4.9.0 through 4.9.1 allows remote authenticated users to write files via XML-RPC image uploads. The mt_uploadImage function in rpc/TXP_RPCServer.php accepts the attacker-controlled file.name value as an upload path without confining it to the image directory. Low-privileged access and the optional XML-RPC server are required; successful requests can overwrite files reachable by the web-server account.

The record

CVE
CVE-2026-5344
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Textpattern
Product
Textpattern CMS
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.9.0
  2. Affected versionversion=4.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Textpattern · Textpattern CMSversion=4.9.0; version=4.9.1

Published CVSS scores

6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDB CNAAV:N/AC:L/Au:S/C:P/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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