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    CVE-2021-25742

    A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.

    Published:Oct 21, 2021
    Last Modified:Nov 21, 2024
    EPS:Oct 29, 2021
    EPSS Score:0.0063
    CVSS Score:7.6

    Affected Products

    Vendor
    Kubernetes
    Product
    Ingress-nginx
    Vendor
    Netapp
    Product
    Trident

    Exploits

    https://github.com/kubernetes/ingress-nginx/issues/7837https://github.com/kubernetes/ingress-nginx/issues/7837

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-102 Session Sidejacking
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-474 Signature Spoofing by Key Theft
    CAPEC-50 Password Recovery Exploitation
    CAPEC-509 Kerberoasting
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-551 Modify Existing Service
    CAPEC-555 Remote Services with Stolen Credentials
    CAPEC-560 Use of Known Domain Credentials
    CAPEC-561 Windows Admin Shares with Stolen Credentials
    CAPEC-588 DOM-Based XSS
    CAPEC-600 Credential Stuffing
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-644 Use of Captured Hashes (Pass The Hash)
    CAPEC-645 Use of Captured Tickets (Pass The Ticket)
    CAPEC-652 Use of Known Kerberos Credentials
    CAPEC-653 Use of Known Operating System Credentials
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-4342 (CVSS 8.8) — A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inj…
    CVE-2026-3288 (CVSS 8.8) — A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingres…
    CVE-2025-15566 (CVSS 8.8) — A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers…
    CVE-2026-24514 (CVSS 6.5) — A security issue was discovered in ingress-nginx where the validating admission controller feature is subject …
    CVE-2026-24513 (CVSS 3.1) — A security issue was discovered in ingress-nginx where the protection afforded by the `auth-url` Ingress annot…
    CVE-2026-24512 (CVSS 8.8) — A security issue was discovered in ingress-nginx where the `rules.http.paths.path` Ingress field can be used t…
    CVE-2026-1580 (CVSS 8.8) — A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-method` Ingress a…
    CVE-2025-24514 (CVSS 8.8) — A security issue was discovered in ingress-nginx https://github.com/kubernetes/ingress-nginx where the `auth…
    CVE-2025-24513 (CVSS 4.8) — A security issue was discovered in ingress-nginx https://github.com/kubernetes/ingress-nginx where attacker-…
    CVE-2025-1098 (CVSS 8.8) — A security issue was discovered in ingress-nginx https://github.com/kubernetes/ingress-nginx where the `mirr…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High