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CVE-2020-5298: Improper Neutralization of Alternate XSS Syntax

June 3, 2020 (updated March 4, 2021)

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).

References

  • packetstormsecurity.com/files/158730/October-CMS-Build-465-XSS-File-Read-File-Deletion-CSV-Injection.html
  • seclists.org/fulldisclosure/2020/Aug/2
  • github.com/advisories/GHSA-gg6x-xx78-448c
  • github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c
  • github.com/octobercms/october/security/advisories/GHSA-gg6x-xx78-448c
  • nvd.nist.gov/vuln/detail/CVE-2020-5298

Code Behaviors & Features

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Affected versions

All versions starting from 1.0.319 before 1.0.466

Fixed versions

  • 1.0.466

Solution

Upgrade to version 1.0.466 or above.

Impact 4.8 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-87: Improper Neutralization of Alternate XSS Syntax

Source file

packagist/october/backend/CVE-2020-5298.yml

Spotted a mistake? Edit the file on GitLab.

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