WeKnora before 0.7.0 fails to re-validate HTTP redirect targets in the POST /api/v1/knowledge-bases/:id/knowledge/url endpoint when downloading documents from user-supplied URLs. Authenticated attackers can bypass initial SSRF validation by supplying a public URL that redirects to internal network addresses, allowing access to internal services and cloud metadata.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Tencent Weknora
cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*
|
0.5.2
|
0.7.0
|
References 5
https://github.com/Tencent/WeKnora
disclosure@vulncheck.com
https://github.com/Tencent/WeKnora/blob/v0.6.2/internal/application/service/kno…
disclosure@vulncheck.com
https://github.com/Tencent/WeKnora/commit/1d322c525a6197d24f07555b4b18ad33313b4…
disclosure@vulncheck.com
https://github.com/Tencent/WeKnora/issues/2511
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/weknora-before-0.7.0-ssrf-via-unvalidated-…
disclosure@vulncheck.com