CVE-2017-1000063: kittoframework kitto version 0.5.1 is vulnerable to an XSS in the 404 page resulting in information disclosure

Routine

MEDIUM 6.1DOWNGRADE

CVE-2017-1000063 is a medium-severity flaw (CVSS 6.1) affecting kitto. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

kittoframework kitto version 0.5.1 is vulnerable to an XSS in the 404 page resulting in information disclosure

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-79
Published	2017-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kitto project

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

Am I affected?

Timeline

2017-07-17 13:18 UTCPublished CVE record published
2026-06-17 00:58 UTCUpdated Record last modified

kitto project kitto DOWNGRADE

Affected: 0.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.5.1

1. Check installed version

apt-cache policy kitto || rpm -q kitto || kitto --version

2. No fixed release: DOWNGRADE to a release before 0.5.1 (Debian / Ubuntu)

apt-cache madison kitto sudo apt install kitto=<VERSION_BEFORE_0.5.1> sudo apt-mark hold kitto

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kitto sudo dnf downgrade kitto-<VERSION_BEFORE_0.5.1> sudo dnf versionlock add kitto

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2017-1000063?

kitto: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-1000063 being exploited?

CVE-2017-1000063 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-2017-1000063 affect?

CVE-2017-1000063 affects kitto. Severity is medium (CVSS 6.1). kittoframework kitto version 0.5.1 is vulnerable to an XSS in the 404 page resulting in information disclosure

How urgent is CVE-2017-1000063?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2017-1000064 HIGH 7.5 DOWNGRADE kittoframework kitto version 0.5.1 is vulnerable to memory exhaustion in the router resulting in DoS
CVE-2017-1000062 HIGH 7.5 DOWNGRADE kittoframework kitto 0.5.1 is vulnerable to directory traversal in the router resulting in remote code executi

References

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