CVE-2019-13321

Unauthorized captive portal redirect via crafted response

Published Feb 10, 2020 · Updated Aug 4, 2024

Authorization bypass in Xiaomi Mi Browser before 10.4.0 allows attackers to redirect its captive-portal browser via a crafted HTTP response. The captive-portal WebView accepts the response and opens an attacker-selected browser location without user interaction. Exploitation requires connection to a malicious access point, and code execution additionally requires another vulnerability in the current process.

CVSS severity5.5
Medium
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Xiaomi Mi Browser before 10.4.0 allows attackers to redirect its captive-portal browser via a crafted HTTP response. The captive-portal WebView accepts the response and opens an attacker-selected browser location without user interaction. Exploitation requires connection to a malicious access point, and code execution additionally requires another vulnerability in the current process.

The record

CVE
CVE-2019-13321
Published
Feb 10, 2020
Updated
Aug 4, 2024
Vendor
Xiaomi Corporation
Product
Mi Browser
Classifications
CWE-732, T1189
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=Prior to 10.4.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Xiaomi Corporation · Mi Browserversion=Prior to 10.4.0

Published CVSS scores

8.0NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
5.4NVDAV:A/AC:M/Au:N/C:P/I:P/A:P
5.5Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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