How severe is CVE-2024-21499?

CVE-2024-21499 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2024-21499 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21499?

CVE-2024-21499 affects Greenpau Caddy-security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21499?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-21499 have an EU (EUVD) identifier?

Yes. CVE-2024-21499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0712.

When was CVE-2024-21499 published?

CVE-2024-21499 was published on 2024-02-17 and last updated on 2026-06-17.

CVE-2024-21499

CVE-2024-21499 is a medium-severity vulnerability in Greenpau Caddy-security with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-116.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-0712
Weakness: CWE-116
Affected product: Greenpau Caddy-security
Published: 2024-02-17
Last modified: 2026-06-17

Description

All versions of the package github.com/greenpau/caddy-security are vulnerable to HTTP Header Injection via the X-Forwarded-Proto header due to redirecting to the injected protocol.Exploiting this vulnerability could lead to bypass of security mechanisms or confusion in handling TLS.

Frequently asked questions

What is CVE-2024-21499?: All versions of the package github.com/greenpau/caddy-security are vulnerable to HTTP Header Injection via the X-Forwarded-Proto header due to redirecting to the injected protocol.Exploiting this vulnerability could lead to bypass of security mechanisms or confusion in handling TLS.
How severe is CVE-2024-21499?: CVE-2024-21499 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2024-21499 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21499?: CVE-2024-21499 affects Greenpau Caddy-security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21499?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-21499 have an EU (EUVD) identifier?: Yes. CVE-2024-21499 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-0712.
When was CVE-2024-21499 published?: CVE-2024-21499 was published on 2024-02-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:greenpau:caddy-security:*:*:*:*:*:*:*:*

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