CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS
Percentile
25.5%
The export feature lets a user export a single entry or a set of entries in a given format (e.g. PDF, MOBI, TXT).
For example, https://yourinstance.wallabag.org/export/45.pdf
will export the entry with id 45 in PDF format.
Since wallabag 2.0.0-alpha.1, this feature is vulnerable to an insecure direct object reference attack. A logged user can export any single entry without ownership validation.
This is due to a lack of access validation in the downloadEntryAction
method.
You should immediately patch your instance to version 2.5.3 or higher if you have more than one user and/or having open registration.
A user check is now done in the vulnerable method before sending the exported entry.
The Entry
retrieval through a ParamConverter
has also been replaced with a call to the EntryRepository
in order to prevent any information disclosure through response discrepancy.
If you are unable to update to the latest version or if you want to temporarily limit risk of exploitation, you may consider blocking requests to the endpoint /export/*
.
E.g. with nginx:
location /export {
deny all;
}
We would like to thank @bAuh0lz for reporting this issue through huntr.dev.
Reference: https://www.huntr.dev/bounties/3adef66f-fc86-4e6d-a540-2ffa59342ff0/