Comments (3)
Summary
An authenticated malicious user can take advantage of a XSS vulnerability in the "Modify Group" feature in Admin
Steps to Reproduce:
- Login into the Admin panel
- Go to '/backend/groups/index.php'
- Add group with name '">
- Save group.
Impact
Cookie Stealing - A malicious user can steal cookies and use them to gain access to the application.
Arbitrary requests - An attacker can use XSS to send requests that appear to be from the victim to the web server.
Malware download - XSS can prompt the user to download malware. Since the prompt looks like a legitimate request from the
site, the user may be more likely to trust the request and actually install the malware.
Defacement - attacker can deface the website using javascript code.
Add group with name : https://twitter.com/XssPayloads/status/1270944976705335296
Vulnerability affects all of the admin endpoints.
from blackcatcms.
The group name is saved as \"\">
from blackcatcms.
The group name is now escaped with htmlspecialchars(). Not a perfect solution, but good enough as backend access is required.
from blackcatcms.
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