Statmic CMS vulnerable to account takeover via XSS and password reset link

2024-02-0120:51:46

Google

osv.dev

xss

password reset

file upload

mime type validation

account takeover

statmic cms

security patch

vulnerability disclosure

sec consult.

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

20.6%

JSON

Impact

HTML files crafted to look like jpg files are able to be uploaded, allowing for XSS.

This affects:

front-end forms with asset fields without any mime type validation
asset fields in the control panel
asset browser in the control panel

Additionally, if the XSS is crafted in a specific way, the “copy password reset link” feature may be exploited to gain access to a user’s password reset token and gain access to their account. The authorized user is required to execute the XSS in order for the vulnerability to occur.

Patches

In versions 4.46.0 and 3.4.17, the XSS vulnerability has been patched, and the copy password reset link functionality has been disabled. (Users may still trigger password reset emails.)

Credits

Statamic thanks Niklas Schilling (discovery, analysis, coordination) from the SEC Consult Vulnerability Lab (https://www.sec-consult.com/) for responsibly reporting the identified issues and working with us as we addressed them.