What is GHSA-w4pj-7p68-3vgv?

GHSA-w4pj-7p68-3vgv is a security advisory published by GitHub Security Advisories with Low severity. Stored XSS in October

Which CVE IDs does GHSA-w4pj-7p68-3vgv cover?

GHSA-w4pj-7p68-3vgv covers the following CVE IDs: CVE-2020-11083. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-w4pj-7p68-3vgv?

GHSA-w4pj-7p68-3vgv has a CVSS v3 base score of 3.5, published by GitHub Security Advisories.

Which products are affected by GHSA-w4pj-7p68-3vgv?

GHSA-w4pj-7p68-3vgv affects 1 product, including: composer/october/backend:\u003e= 1.0.319, \u003c 1.0.466.

GHSA-w4pj-7p68-3vgvLowCVSS 3.5

Stored XSS in October

Vendor

GitHub Security Advisories

Published

August 5, 2020

Last Modified

January 31, 2023

🔗 CVE IDs covered (1)

CVE-2020-11083 →

📋 Description

Impact

A user with access to a markdown FormWidget that stores data persistently could create a stored XSS attack against themselves and any other users with access to the generated HTML from the field.

Patches

Issue has been patched in Build 466 (v1.0.466) & RainLab.Blog v1.4.1 by restricting the ability to store JS in markdown to only users that have been explicitly granted the backend.allow_unsafe_markdown permission.

Workarounds

Apply https://github.com/octobercms/october/commit/9ecfb4867baae14a0d3f99f5b5c1e8a979ae8746 & https://github.com/rainlab/blog-plugin/commit/6ae19a6e16ef3ba730692bc899851342c858bb94 to your installation manually if unable to upgrade to Build 466 or v1.4.1 of RainLab.Blog (if using that plugin).

References

Reported by Sivanesh Ashok

For more information

If you have any questions or comments about this advisory:

Email us at [email protected]

Threat assessment:

🎯 Affected products1

composer/october/backend:>= 1.0.319, < 1.0.466