e621ng versions before 26.09.16 pass untrusted request parameters directly to Rails url_for in PaginatorComponent and controller navigation links, allowing attackers to redirect pagination and navigation controls to attacker-controlled origins. Attackers can supply host, protocol, and port query parameters that are interpreted as URL generation options, causing pagination links to point to malicious domains while the initial page loads from the legitimate site.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/e621ng/e621ng
disclosure@vulncheck.com
https://github.com/e621ng/e621ng/blob/26.09.02/app/components/paginator_compone…
disclosure@vulncheck.com
https://github.com/e621ng/e621ng/commit/e1a3930bf1750b02a23843ec88c33e2aa06e2a5e
disclosure@vulncheck.com
https://github.com/e621ng/e621ng/pull/2518
disclosure@vulncheck.com
https://github.com/e621ng/e621ng/releases/tag/26.09.16
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/e621ng-before-26.09.16-open-redirect-via-u…
disclosure@vulncheck.com