CVE-2020-9280

SilverStripe Folders migrated from 3.x may be unsafe to upload to

7.5 HighFix available

In SilverStripe through 4.5, files uploaded via Forms to folders migrated from Silverstripe CMS 3.x may be put to the default "/Uploads" folder instead. This affects installations which allowed upload folder protection via the optional silverstripe/secureassets module under 3.x. This module is installed and enabled by default on the Common Web Platform (CWP). The vulnerability only affects files uploaded after an upgrade to 4.x.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.73%Up 0.8 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2020-9280
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-434
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-9280
Updated: 2026-11-02

EUVDEUVD-2022-2539 No score

Record: EUVD-2022-2539
Updated: 2026-11-03

GitHub AdvisoriesGHSA-592m-4533-rxq9 7.5

SilverStripe Folders migrated from 3.x may be unsafe to upload to

Record: GHSA-592m-4533-rxq9
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-434
Updated: 2026-11-02

OSV 7.5

Record: CVE-2020-9280
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVGHSA-592m-4533-rxq9 7.5

SilverStripe Folders migrated from 3.x may be unsafe to upload to

Record: GHSA-592m-4533-rxq9
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-434
Updated: 2026-11-02

OSVBIT-silverstripe-2020-9280 No score

Record: BIT-silverstripe-2020-9280
Updated: 2026-11-02

Affected products

silverstripe

Affected packages

Affected packages
Package	Affected	Fixed
`silverstripe/framework` Packagist	4.0.0 up to 4.4.6	4.4.6
`silverstripe/userforms` Packagist	5.0.0 up to 5.4.2	5.4.2
`silverstripe/assets` Packagist	1.0.0 up to 1.4.7	1.4.7
`silverstripe/assets` Packagist	1.5.0 up to 1.5.2	1.5.2
`silverstripe` Bitnami	4.0.0 up to 4.5.0	4.5.0
`silverstripe/framework` Packagist	4.0.0 up to 4.4.6, plus listed versions 4.0.14.0.1-rc14.0.24.0.34.0.4 Show 32 moreShow less 4.0.54.0.64.0.74.1.04.1.0-rc14.1.0-rc24.1.14.1.24.1.34.1.44.1.54.2.04.2.0-beta14.2.14.2.24.2.34.2.44.2.54.3.04.3.0-rc14.3.14.3.24.3.34.3.44.3.54.4.04.4.0-rc14.4.14.4.24.4.34.4.44.4.5	4.4.6
`silverstripe/userforms` Packagist	5.0.0 up to 5.4.2, plus listed versions 5.0.15.0.25.1.05.1.15.2.0 Show 8 moreShow less 5.2.15.2.25.3.05.3.15.3.25.3.35.4.05.4.1	5.4.2
`silverstripe/assets` Packagist	1.0.0 up to 1.4.7, plus listed versions 1.0.11.0.1-rc11.0.21.0.31.0.4 Show 33 moreShow less 1.0.51.0.61.0.71.1.01.1.0-rc11.1.0-rc21.1.11.1.21.1.31.1.41.1.51.2.01.2.0-beta11.2.11.2.21.2.31.2.41.2.51.3.01.3.0-rc11.3.11.3.21.3.31.3.41.3.51.4.01.4.0-rc11.4.11.4.21.4.31.4.41.4.51.4.6	1.4.7
`silverstripe/assets` Packagist	1.5.0 up to 1.5.2, plus listed versions 1.5.1	1.5.2

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-9280 is a high vulnerability (CVSS 7.5) in Silverstripe, published April 15, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.73%, the 77th percentile. Fixed in silverstripe/framework 4.4.6.