CVE-2023-6835Network attack vector

API ranking manipulation via unchecked forum ratings

Published Dec 15, 2023 · Updated Aug 2, 2024

Improper input validation in affected WSO2 API Manager and IoT Server releases allows remote authenticated users to manipulate API ratings. RegistryForumManager.rateTopic accepts an integer rating without enforcing the intended 1-to-5 range before storing it. A low-privileged account can submit out-of-range values that inflate API rankings when ratings are used for sorting.

CVSS severity4.3
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected WSO2 API Manager and IoT Server releases allows remote authenticated users to manipulate API ratings. RegistryForumManager.rateTopic accepts an integer rating without enforcing the intended 1-to-5 range before storing it. A low-privileged account can submit out-of-range values that inflate API rankings when ratings are used for sorting.

The record

CVE
CVE-2023-6835
Published
Dec 15, 2023
Updated
Aug 2, 2024
Vendor
WSO2
Product
WSO2 IoT Server
Classifications
CWE-20, CAPEC-153, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.3.1.0 <3.3.1.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

WSO2 · WSO2 IoT Serverversion=3.3.1.0 <3.3.1.17
WSO2 · WSO2 API Managerversion=2.2.0.0 <2.2.0.16; version=2.5.0.0 <2.5.0.17; version=2.6.0.0 <2.6.0.24

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3WSO2CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CAPEC-153Input Data Manipulation
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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