CVE-2020-16608: Notable 1.8.4 allows XSS via crafted Markdown text, with resultant remote code execution (because nodeIntegrat

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CRITICAL 9.6DOWNGRADE

CVE-2020-16608 is a critical-severity flaw (CVSS 9.6) affecting notable. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Notable 1.8.4 allows XSS via crafted Markdown text, with resultant remote code execution (because nodeIntegration in webPreferences is true).

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	4.5% (top 8%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-12-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: notable

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

Am I affected?

Timeline

2020-12-10 23:15 UTCPublished CVE record published
2026-06-17 02:58 UTCUpdated Record last modified

notable notable DOWNGRADE

Affected: 1.8.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.8.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.8.4 (Debian / Ubuntu)

apt-cache madison notable sudo apt install notable=<VERSION_BEFORE_1.8.4> sudo apt-mark hold notable

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

dnf --showduplicates list notable sudo dnf downgrade notable-<VERSION_BEFORE_1.8.4> sudo dnf versionlock add notable

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-2020-16608?

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

Is CVE-2020-16608 being exploited?

CVE-2020-16608 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-2020-16608 affect?

CVE-2020-16608 affects notable. Severity is critical (CVSS 9.6). Notable 1.8.4 allows XSS via crafted Markdown text, with resultant remote code execution (because nodeIntegration in webPreferences is true).

How urgent is CVE-2020-16608?

Priority 61/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference

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References

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