Cyber Resilience

CVE-2024-21510

Published
01 November 2024
Modified
15 April 2026
CVSS Score v3.1 5.4
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
EPSS Score 0.0047 38th percentile
Risk Priority 44 floored blend · peak EPSS

Summary

CVE-2024-21510 is a medium-severity Reliance on Untrusted Inputs in a Security Decision (CWE-807) vulnerability in Snyk (inferred from references). Its CVSS base score is 5.4 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 38th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-24 (Access Control Decisions) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

Versions of the package sinatra from 0.0.0 are vulnerable to Reliance on Untrusted Inputs in a Security Decision via the X-Forwarded-Host (XFH) header. When making a request to a method with redirect applied, it is possible to trigger an Open…

more

Redirect Attack by inserting an arbitrary address into this header. If used for caching purposes, such as with servers like Nginx, or as a reverse proxy, without handling the X-Forwarded-Host header, attackers can potentially exploit Cache Poisoning or Routing-based SSRF.

CWE(s)
CWE-807

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1548 Abuse Elevation Control Mechanism Privilege Escalation
Adversaries may circumvent mechanisms designed to control privilege elevation to gain higher-level permissions.
attack.mitre.org →
T1556 Modify Authentication Process Defense Impairment
Adversaries may modify authentication mechanisms and processes to access user credentials or enable otherwise unwarranted access to accounts.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-9310Shared CWE-807
CVE-2025-11271Shared CWE-807
CVE-2024-45654Shared CWE-807
CVE-2026-35655Shared CWE-807
CVE-2026-41299Shared CWE-807
CVE-2026-16093Shared CWE-807
CVE-2023-0009Shared CWE-807
CVE-2026-35624Shared CWE-807
CVE-2026-32898Shared CWE-807
CVE-2025-0117Shared CWE-807

Affected Assets

Snyk
—
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 1 hardening rule · 1 OS baseline
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

AC-24 Access Control Decisions good match

Explicitly requires that every access decision be based on authoritative, protected decision data rather than caller-supplied inputs.

SI-10 Information Input Validation good match

Input validation can reject malformed or attacker-controlled values before they reach a security decision point.

AC-3 Access Enforcement partial match

Access enforcement requires decisions to be made from trusted policy data rather than modifiable client-supplied inputs.

AC-4 Information Flow Enforcement partial match

Information-flow enforcement applies rules to validated, internal attributes instead of untrusted external values.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 mostly match
prevents

Strong authentication mechanisms directly prevent security decisions from depending on modifiable, untrusted inputs.

PR.AA-04 mostly match
prevents

Verification and protection of identity assertions stops reliance on attacker-controlled values for authorization decisions.

PR.AA-01 partial match
prevents

Proper management of identities/credentials reduces the chance that security decisions will be driven by untrusted inputs.

PR.AA-05 partial match
prevents

Policy-driven, least-privilege authorization reduces opportunities to bypass controls via tampered inputs.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards directly prohibit using untrusted inputs for security-critical decisions.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development catches input-validation flaws before deployment.

A.8.16 Monitoring activities partial match
finds

Monitoring can detect exploitation but does not stop the underlying weakness.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for validation of inputs used in security decisions.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles mandate treating all external inputs as untrusted.

A.8.3 Information access restriction partial match
prevents

Access-control rules can be bypassed if they rely on untrusted inputs.

References