Reflected XSS when importing CSV in OctoberCMS
Priority LOW 24CWE-87Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
In OctoberCMS (october/october composer package) versions from 1.0.319 and before 1.0.466, a user with the ability to use the import functionality of the `ImportExportController` behavior can be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question Issue has been patched in Build 466 (v1.0.466).
Why it matters now
EPSS 0.00909 60th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed october (octobercms): 1.0.466october/backend (Packagist): 1.0.466
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| October CMS | october | 1.0.319 to before 1.0.466 | 1.0.466 | Patch available | CNA |
| — | october/backend (Packagist) | 1.0.319 to before 1.0.466 | 1.0.466 | Patch available | GHSA-gg6x-xx78-448c |
- october VendorOctober CMS Affected 1.0.319 to before 1.0.466 Fixed in 1.0.466 Patch available CNA
- october/backend (Packagist) Vendor— Affected 1.0.319 to before 1.0.466 Fixed in 1.0.466 Patch available GHSA-gg6x-xx78-448c
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* | 1.0.319 to before 1.0.466 | Vulnerable | October CMS |
- cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:* Versions 1.0.319 to before 1.0.466 Vulnerable ·October CMS
Remediation
- Fix · CNA october (octobercms) Fixed in 1.0.466
- Fix · GHSA-gg6x-xx78-448c october/backend (Packagist) Fixed in 1.0.466 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5298
- 2026-10-03 Alias added: GHSA-gg6x-xx78-448c
References
Exploit 2
Patch 2
More October CMS October vulnerabilities
- TI-2021-12316 Account Takeover in Octobercms KEVCVSS 3.1CRITICAL 9.1
- TI-2021-12318 Arbitrary code execution in october/system CVSS 3.1HIGH 8.8
- TI-2017-14456 October CMS build 412 is vulnerable to PHP code execution in the file upload… CVSS 3.0HIGH 7.2
- TI-2023-23545 A Cross-Site Scripting (XSS) vulnerability in installation of October v.3.4.16 allows an… CVSS 3.1MEDIUM 5.4
- TI-2023-19223 An arbitrary file upload vulnerability in October CMS v3.4.4 allows attackers to execute… CVSS 3.1MEDIUM 5.4
- TI-2024-30847 October 3.6.30 allows an authenticated admin account to upload a PDF file containing… CVSS 3.1MEDIUM 4.7
Sources
- CVE-2020-5298 · CVE Program
- CVE-2020-5298 · NVD
- FIRST EPSS
- GHSA-gg6x-xx78-448c · GitHub Advisory Database · CC BY 4.0
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