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osvGoogleOSV:GHSA-QPGM-GJGF-8C2X
HistoryMay 26, 2023 - 1:55 p.m.

Craft CMS XSS in RSS widget feed

2023-05-2613:55:00
Google
osv.dev
11
malformed rss feed
xss payload
rss widget
craft cms
security vulnerability
github commit

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

EPSS

0.001

Percentile

32.9%

Summary

A malformed RSS feed can deliver an XSS payload

PoC

Create an RSS widget and add the domain https://blog.whitebear.vn/file/rss-xss2.rss
The XSS payload will be triggered by the title in tag <item>

Resolved in https://github.com/craftcms/cms/commit/b77cb3023bed4f4a37c11294c4d319ff9f598e1f

CVSS3

6.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

EPSS

0.001

Percentile

32.9%

Related for OSV:GHSA-QPGM-GJGF-8C2X