CVE-2024-21493: All versions of the package github.com/greenpau/caddy-security are vulnerable to Improper Validation of Array

Routine

MEDIUM 5.3REMOTEMITIGATE

CVE-2024-21493 is a medium-severity flaw (CVSS 5.3) affecting caddy-security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All versions of the package github.com/greenpau/caddy-security are vulnerable to Improper Validation of Array Index when parsing a Caddyfile. Multiple parsing functions in the affected library do not validate whether their input values are nil before attempting to access elements, which can lead to a panic (index out of range). Panics during the parsing of a configuration file may introduce ambiguity and vulnerabilities, hindering the correct int

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-129
Published	2024-02-17
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: greenpau

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

Am I affected?

Timeline

2024-02-17 05:15 UTCPublished CVE record published
2026-06-17 07:09 UTCUpdated Record last modified

greenpau caddy-security MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy caddy-security || rpm -q caddy-security || caddy-security --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2024-21493?

caddy-security: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-21493 being exploited?

CVE-2024-21493 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-2024-21493 affect?

CVE-2024-21493 affects caddy-security. Severity is medium (CVSS 5.3). All versions of the package github.com/greenpau/caddy-security are vulnerable to Improper Validation of Array Index when parsing a Caddyfile. Multiple parsing functions in the affected library do not validate whether their input values are

How urgent is CVE-2024-21493?

Priority 37/100. Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities · Caddy vulnerabilities

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References

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