CVE-2015-5673: eventapp/lib/gcloud.rb in the ISUCON5 qualifier portal (aka eventapp) web application before 2015-10-30 makes

This month

MEDIUM 6.5MITIGATE

CVE-2015-5673 is a medium-severity flaw (CVSS 6.5) affecting isucon 5 qualifier eventapp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eventapp/lib/gcloud.rb in the ISUCON5 qualifier portal (aka eventapp) web application before 2015-10-30 makes improper popen calls, which allows remote attackers to execute arbitrary commands via an HTTP request that includes shell metacharacters in an argument to a "gcloud compute" command.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Weakness	CWE-78
Published	2015-11-04
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: isucon

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-11-04 03:59 UTCPublished CVE record published
2026-06-17 00:29 UTCUpdated Record last modified

isucon isucon 5 qualifier eventapp MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy isucon-5-qualifier-eventapp || rpm -q isucon-5-qualifier-eventapp || isucon-5-qualifier-eventapp --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-5673?

isucon 5 qualifier eventapp: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-5673 being exploited?

CVE-2015-5673 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-5673 affect?

CVE-2015-5673 affects isucon 5 qualifier eventapp. Severity is medium (CVSS 6.5). eventapp/lib/gcloud.rb in the ISUCON5 qualifier portal (aka eventapp) web application before 2015-10-30 makes improper popen calls, which allows remote attackers to execute arbitrary commands via an HTTP request that includes shell metachar

How urgent is CVE-2015-5673?

Priority 44/100. No elevated risk signals yet.

References

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