CVE-2017-1000491: Shiba markdown live preview app version 1.1.0 is vulnerable to XSS which leads to code execution due to enable

Routine

MEDIUM 6.1DOWNGRADE

CVE-2017-1000491 is a medium-severity flaw (CVSS 6.1) affecting shiba. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Shiba markdown live preview app version 1.1.0 is vulnerable to XSS which leads to code execution due to enabled node integration.

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	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-01-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: shiba project

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

shiba project shiba DOWNGRADE

Affected: 1.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.1.0 (Debian / Ubuntu)

apt-cache madison shiba sudo apt install shiba=<VERSION_BEFORE_1.1.0> sudo apt-mark hold shiba

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

dnf --showduplicates list shiba sudo dnf downgrade shiba-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add shiba

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-2017-1000491?

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

Is CVE-2017-1000491 being exploited?

CVE-2017-1000491 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-2017-1000491 affect?

CVE-2017-1000491 affects shiba. Severity is medium (CVSS 6.1). Shiba markdown live preview app version 1.1.0 is vulnerable to XSS which leads to code execution due to enabled node integration.

How urgent is CVE-2017-1000491?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2020-7738 HIGH 8.3 MITIGATE All versions of package shiba are vulnerable to Arbitrary Code Execution due to the default usage of the funct

References

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