CVE-2018-18282: Next.js 7.0.0 and 7.0.1 has XSS via the 404 or 500 /_error page.

Routine

MEDIUM 6.1DOWNGRADE

CVE-2018-18282 is a medium-severity flaw (CVSS 6.1) affecting next.js. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Next.js 7.0.0 and 7.0.1 has XSS via the 404 or 500 /_error page.

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	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-10-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zeit

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

Am I affected?

Timeline

2018-10-12 22:29 UTCPublished CVE record published
2026-06-17 01:46 UTCUpdated Record last modified

zeit next.js DOWNGRADE

Affected: 7.0.0 · 7.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy next.js || rpm -q next.js || next.js --version

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison next.js sudo apt install next.js=<VERSION_BEFORE_7.0.0> sudo apt-mark hold next.js

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

dnf --showduplicates list next.js sudo dnf downgrade next.js-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add next.js

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-2018-18282?

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

Is CVE-2018-18282 being exploited?

CVE-2018-18282 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-2018-18282 affect?

CVE-2018-18282 affects next.js. Severity is medium (CVSS 6.1). Next.js 7.0.0 and 7.0.1 has XSS via the 404 or 500 /_error page.

How urgent is CVE-2018-18282?

Priority 37/100. No elevated risk signals yet.

Software pages

Next.js vulnerabilities

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References

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