CVE-2024-21499

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 40.1% of scored records. A rank, not a probability.

NVD base score

4.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2024-02-17 05:00Z2 YR AGO

Last updated

2024-08-01 22:20Z2 YR AGO

Reserved

2023-12-22

Assigning CNA

snyk

Record state

PUBLISHED

Severity

Medium (CVSS 4.3)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:P

Weaknesses

• CWE-644Improper Neutralization of HTTP Headers for Scripting SyntaxVariant
• CWE-116Improper Encoding or Escaping of OutputClass

Data version

5.1

Document digest

5dfc02616b64dc6012edac6cde9afdd71af28bda4e760cd725d6ea5a8b72cfbb

• security.snyk.iohttps://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-6249863
• github.comhttps://github.com/greenpau/caddy-security/issues/270
• blog.trailofbits.comhttps://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy/