CVE-2017-1000463: Leafpub version 1.2.0-beta6 is vulnerable to stored cross-site scripting vulnerability, within the edit blog p

Routine

MEDIUM 5.4DOWNGRADE

CVE-2017-1000463 is a medium-severity flaw (CVSS 5.4) affecting leafpub. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Leafpub version 1.2.0-beta6 is vulnerable to stored cross-site scripting vulnerability, within the edit blog post page, which can result in disruption of service and execution of javascript code.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-01-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: leafpub

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

Am I affected?

Timeline

2018-01-03 00:29 UTCPublished CVE record published
2026-06-17 00:59 UTCUpdated Record last modified

leafpub leafpub DOWNGRADE

Affected: 1.2.0 beta6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison leafpub sudo apt install leafpub=<VERSION_BEFORE_1.2.0> sudo apt-mark hold leafpub

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

dnf --showduplicates list leafpub sudo dnf downgrade leafpub-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add leafpub

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-2017-1000463?

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

Is CVE-2017-1000463 being exploited?

CVE-2017-1000463 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-2017-1000463 affect?

CVE-2017-1000463 affects leafpub. Severity is medium (CVSS 5.4). Leafpub version 1.2.0-beta6 is vulnerable to stored cross-site scripting vulnerability, within the edit blog post page, which can result in disruption of service and execution of javascript code.

How urgent is CVE-2017-1000463?

Priority 32/100. No elevated risk signals yet.

References

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