HIGH

CVE-2026-103521

CVSS v3

7.2

HIGH

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-103521 yet.

Full record on NVD

Description

In Thelia v2.6.0, the document upload endpoint properly blocks the upload of executable file types, but the document update endpoint does not perform the same validation. An attacker with administrative Thelia permissions can exploit this vulnerability to upload arbitrary executable files, such as malicious PHP scripts, to achieve remote code execution on the underlying server.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 2026-10-12
Last Modified: 2026-10-13

Frequently asked questions

What is CVE-2026-103521?

Is CVE-2026-103521 actively exploited?

Active exploitation of CVE-2026-103521 has not been confirmed.

What is the CVSS score for CVE-2026-103521?

CVE-2026-103521 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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