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Description

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.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-05 | Updated 2026-04-06 | Assigner VulDB




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
MEDIUM: 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
MEDIUM: 6.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
6.5AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:ND/RC:UR

Problem types

Server-Side Request Forgery

Product status

1.6.0
affected

1.6.1
affected

Timeline

2026-04-04:Advisory disclosed
2026-04-04:VulDB entry created
2026-04-04:VulDB entry last update

Credits

Ana10gy (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/355291 (VDB-355291 | QingdaoU OnlineJudge judge_server_heartbeat Endpoint JudgeServer.service_url server-side request forgery) vdb-entry technical-description

vuldb.com/vuln/355291/cti (VDB-355291 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/782203 (Submit #782203 | QingdaoU OnlineJudge <=v1.6.1 Stored SSRF) third-party-advisory

github.com/AnalogyC0de/public_exp/issues/27 issue-tracking

cve.org (CVE-2026-5538)

nvd.nist.gov (CVE-2026-5538)

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