Is CVE-2026-27891 actively exploited?

No active exploitation of CVE-2026-27891 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27891 be exploited remotely?

Yes. CVE-2026-27891 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27891?

CVE-2026-27891 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2026-27891

HIGH

CVE-2026-27891

CWE-20Published: May 18, 2026· Updated: May 19, 2026

7.2

CVSS v3.1

EPSS:0.11%probability of exploitation in 30 daysPercentile:29.0th

Official Description

FacturaScripts is an open source accounting and invoicing software. Versions 2026 and below contain a critical vulnerability in the Plugins::add() function. The system fails to properly validate the file paths within uploaded ZIP archives. This allows an attacker to perform a Zip Slip attack, leading to Arbitrary File Write and Remote Code Execution (RCE) by overwriting sensitive .php files outside the designated plugins directory. The vulnerability is located in Plugins.php. While the testZipFile function attempts to validate that the ZIP contains only one root folder, it does not sanitize or validate the individual file paths within that folder. An attacker can bypass this check by naming a file ValidPluginName/../../shell.php. The explode function will see ValidPluginName as the root folder, satisfying the count($folders) != 1 check. However, during extraction, the ../../ sequence triggers a path traversal, allowing the file to be written anywhere the web server has permissions the root directory. This issue is fixed in version 2026.1.

NVD Source

Technical Analysis

CVE-2026-27891 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.