CVE-2020-3888Network attack vector

Cross-context interference via weak web restrictions

Published Apr 1, 2020 · Updated Aug 4, 2024

A logic issue in the Web App component of Apple iOS before 13.4 allows remote attackers to interfere with other web contexts via a maliciously crafted page. Apple describes the defect only as a logic issue fixed through improved restrictions and does not disclose the specific check or code locus. Exploitation requires a victim to load attacker-controlled web content; the documented consequence is interference across web contexts rather than stated code execution or device takeover.

CVSS severity4.3
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A logic issue in the Web App component of Apple iOS before 13.4 allows remote attackers to interfere with other web contexts via a maliciously crafted page. Apple describes the defect only as a logic issue fixed through improved restrictions and does not disclose the specific check or code locus. Exploitation requires a victim to load attacker-controlled web content; the documented consequence is interference across web contexts rather than stated code execution or device takeover.

The record

CVE
CVE-2020-3888
Published
Apr 1, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
iOS
Classifications
T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 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=unspecified <iOS 13.4 and iPadOS 13.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=unspecified <iOS 13.4 and iPadOS 13.4

Published CVSS scores

4.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1189Drive-by Compromise

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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