CVE-2026-5538
MEDIUMQingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery
Title source: cnaDescription
A vulnerability was detected in QingdaoU OnlineJudge up to 1.6.1. Affected by this issue is the function service_url of the file JudgeServer.service_url of the component judge_server_heartbeat Endpoint. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
References (4)
Core 4
Core References
Vdb Entry, Technical Description vdb-entry
technical-description
VDB-355291 | QingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery
https://vuldb.com/vuln/355291
Signature, Permissions Required signature
permissions-required
VDB-355291 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/355291/cti
Third Party Advisory third-party-advisory
Submit #782203 | QingdaoU OnlineJudge <=v1.6.1 Stored SSRF
https://vuldb.com/submit/782203
Issue Tracking issue-tracking
https://github.com/AnalogyC0de/public_exp/issues/27
Scores
CVSS v3
6.3
EPSS
0.0021
EPSS Percentile
10.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
QingdaoU/OnlineJudge
1.6.0
QingdaoU/OnlineJudge
1.6.1
Published
Apr 05, 2026
Tracked Since
Apr 05, 2026