CVE-2022-31259Public exploitNetwork attack vector

Unauthenticated access-control bypass via suffix-confused route matching

Published May 21, 2022 · Updated Aug 3, 2024

Improper access control in the Beego HTTP router before 1.12.9 and 2.x before 2.0.3 allows remote attackers to reach protected routes. Tree.match strips an allowed .xml, .json, or .html suffix from a fixed path segment and descends into a child router even while unmatched path text remains. Exploitation requires a parameterized descendant route with access control applied to its exact prefix; a crafted path reaches the protected handler without authentication.

CVSS severity9.8
Critical
EPSS probability22.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in the Beego HTTP router before 1.12.9 and 2.x before 2.0.3 allows remote attackers to reach protected routes. Tree.match strips an allowed .xml, .json, or .html suffix from a fixed path segment and descends into a child router even while unmatched path text remains. Exploitation requires a parameterized descendant route with access control applied to its exact prefix; a crafted path reaches the protected handler without authentication.

The record

CVE
CVE-2022-31259
Published
May 21, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

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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