Cyber Resilience

CVE-2024-29021

SSRF

SSRF
Published
18 April 2024
Modified
15 April 2026
CVSS Score v3.1 9.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.20 97th percentile
Risk Priority 76 floored blend · peak EPSS

Summary

CVE-2024-29021 is a critical-severity SSRF (CWE-918) vulnerability. Its CVSS base score is 9.0 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Default Accounts (T1078.001); ranked in the top 3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-4 (Information Flow Enforcement) and CM-6 (Configuration Settings) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access ControlA07:2025 Authentication Failures

EU & UK References

Vulnerability Data

Judge0 is an open-source online code execution system. The default configuration of Judge0 leaves the service vulnerable to a sandbox escape via Server Side Request Forgery (SSRF). This allows an attacker with sufficient access to the Judge0 API to obtain…

more

unsandboxed code execution as root on the target machine. This vulnerability is fixed in 1.13.1.

CWE(s)
CWE-918CWE-1393

Related Threats

MITRE ATT&CK Enterprise Techniques

T1078.001 Default Accounts Stealth
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
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 →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-5269Shared CWE-1393
CVE-2024-13966Shared CWE-1393
CVE-2023-45249Shared CWE-1393
CVE-2025-26793Shared CWE-1393
CVE-2023-43042Shared CWE-1393
CVE-2025-43021Shared CWE-1393
CVE-2026-24429Shared CWE-1393
CVE-2024-48987Shared CWE-1393
CVE-2025-2766Shared CWE-1393
CVE-2026-8672Shared CWE-1393

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.6
  • V1.5.3
  • V5.3.2
  • V10.4.7

Mitigating Controls (NIST 800-53 r5) AI

IA-5 Authenticator Management good match

Authenticator management requires verification of identity at initial distribution and secure handling that directly stops default passwords from remaining in use.

AC-4 Information Flow Enforcement good match

Information flow enforcement can restrict which destinations the server is allowed to contact on behalf of users.

CM-6 Configuration Settings good match

Configuration settings establish the most restrictive secure baselines, which include changing or disabling default passwords.

SI-10 Information Input Validation good match

Input validation directly stops untrusted URLs from being accepted and fetched without destination checks.

SC-7 Boundary Protection partial match

Boundary protection limits the network reach of server-initiated requests even if SSRF occurs.

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-01 full match
prevents

Credential management directly requires replacing default passwords with unique, strong credentials.

PR.PS-01 mostly match
prevents

Hardened configuration baselines explicitly prohibit default passwords, covering most of the weakness but not all identity-management aspects.

PR.PS-06 mostly match
prevents

Secure development practices directly include input validation and destination allow-listing that prevent SSRF.

DE.CM-09 partial match
prevents

Runtime monitoring of web applications and services can detect anomalous outbound requests indicative of SSRF.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover and record SSRF flaws in web applications.

PR.AA-03 partial match
prevents

Authentication policies can enforce non-default passwords but do not address the full scope of credential lifecycle.

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.5.17 Authentication information mostly match
prevents

Mandates secure handling and change of authentication secrets, directly addressing default passwords.

A.8.9 Configuration management mostly match
prevents

Configuration management processes typically enforce changing defaults during hardening.

A.5.7 Threat intelligence partial match
prevents

Operational threat data describing SSRF campaigns can be used to tighten outbound-request allow-lists and detection rules before attackers exploit them.

A.8.5 Secure authentication partial match
mitigates

Requires secure authentication mechanisms, which includes replacing or disabling default credentials.

A.8.18 Use of privileged utility programs none match
none

Utility programs often ship with defaults; control requires secure configuration before use.

A.8.2 Privileged access rights none match
none

Privileged accounts must not retain factory passwords, reducing risk of default-credential abuse.

References