CVE-2023-33187: Highlight is an open source, full-stack monitoring platform

Routine

MEDIUM 5.4UPGRADE

CVE-2023-33187 is a medium-severity flaw (CVSS 5.4) affecting highlight. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Highlight is an open source, full-stack monitoring platform. Highlight may record passwords on customer deployments when a password html input is switched to `type="text"` via a javascript "Show Password" button. This differs from the expected behavior which always obfuscates `type="password"` inputs. A customer may assume that switching to `type="text"` would also not record this input; hence, they would not add additional `highlight-mask` css-c

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-319
Published	2023-05-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: highlight

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

Am I affected?

Timeline

2023-05-26 21:15 UTCPublished CVE record published
2026-06-17 06:01 UTCUpdated Record last modified

highlight highlight UPGRADE

Affected: < 6.0.0

Fixed in: 6.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls highlight

2. UPGRADE to 6.0.0

npm install highlight@">=6.0.0"

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-2023-33187?

highlight: upgrade to 6.0.0. Exact commands for each OS are on this page.

Is CVE-2023-33187 being exploited?

CVE-2023-33187 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-2023-33187 affect?

CVE-2023-33187 affects highlight. Severity is medium (CVSS 5.4). Highlight is an open source, full-stack monitoring platform. Highlight may record passwords on customer deployments when a password html input is switched to `type="text"` via a javascript "Show Password" button. This differs from the expec

How urgent is CVE-2023-33187?

Priority 24/100. No elevated risk signals yet.

References

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