CVE-2026-27891Public exploitNetwork attack vector

Code execution via plugin ZIP path traversal

Published May 18, 2026 · Updated May 18, 2026

Path traversal in FacturaScripts before 2026.1 allows remote authenticated users to write files and execute PHP via a crafted plugin ZIP. Plugins::add() calls testZipFile(), which checks only the first path segment before extraction and accepts entries such as ValidPluginName/../../shell.php. Administrator-level plugin upload access is required; a planted PHP file executes with web-server permissions and can expose, alter, or delete application data.

CVSS severity7.2
High
EPSS probability0.52%
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 FacturaScripts before 2026.1 allows remote authenticated users to write files and execute PHP via a crafted plugin ZIP. Plugins::add() calls testZipFile(), which checks only the first path segment before extraction and accepts entries such as ValidPluginName/../../shell.php. Administrator-level plugin upload access is required; a planted PHP file executes with web-server permissions and can expose, alter, or delete application data.

The record

CVE
CVE-2026-27891
Published
May 18, 2026
Updated
May 18, 2026
Vendor
FacturaScripts
Product
FacturaScripts
Classifications
CWE-20, CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 18, 2026CVE publishedPublication date reported by the CVE source.
  2. May 18, 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=< 2026.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

FacturaScripts · FacturaScriptsversion=< 2026.1

Published CVSS scores

7.2GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:H/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 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-20Improper Input Validation
CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web 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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