HAProxy Kubernetes Ingress Controller up to 3.1.12 config-snippets Feature Flag incomplete filtering of special elements

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in HAProxy Kubernetes Ingress Controller up to 3.1.12 and classified as critical. Affected by this vulnerability is an unknown functionality of the component config-snippets Feature Flag Handler. Executing a manipulation can lead to incomplete filtering of special elements. This vulnerability is handled as CVE-2025-59303. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in HAProxy Kubernetes Ingress Controller up to 3.1.12. This vulnerability affects an unknown code of the component config-snippets Feature Flag Handler. The manipulation with an unknown input leads to a incomplete filtering of special elements vulnerability. The CWE definition for the vulnerability is CWE-791. The product receives data from an upstream component, but does not completely filter special elements before sending it to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

HAProxy Kubernetes Ingress Controller before 3.1.13, when the config-snippets feature flag is used, accepts config snippets from users with create/update permissions. This can result in obtaining an ingress token secret as a response. The fixed versions of HAProxy Enterprise Kubernetes Ingress Controller are 3.0.16-ee1, 1.11.13-ee1, and 1.9.15-ee1.

The advisory is available at haproxy.com. This vulnerability was named CVE-2025-59303 since 09/12/2025. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 3.1.13 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Incomplete filtering of special elements
CWE: CWE-791 / CWE-790 / CWE-184
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kubernetes Ingress Controller 3.1.13

Timelineinfo

09/12/2025 CVE reserved
10/08/2025 +26 days Advisory disclosed
10/08/2025 +0 days VulDB entry created
10/08/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: haproxy.com
Status: Confirmed

CVE: CVE-2025-59303 (🔒)
GCVE (CVE): GCVE-0-2025-59303
GCVE (VulDB): GCVE-100-327646

Entryinfo

Created: 10/08/2025 20:29
Changes: 10/08/2025 20:29 (64)
Complete: 🔍
Cache ID: 216::103

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