CVE-2019-12278Public exploitNetwork attack vector

Address bar spoofing via Unicode bidi rendering

Published Mar 12, 2020 · Updated Aug 4, 2024

Address bar spoofing in Opera through 53 on Android allows remote attackers to display a spoofed URL via mishandled Unicode directionality. The address-bar rendering path mishandles right-to-left Unicode characters and the first-strong-character rule when processing numerical IP addresses or alphabetic strings, causing the displayed origin to differ from the actual destination. Exploitation requires a victim to load attacker-controlled web content; the consequence is deceptive URL presentation that can support phishing, without evidence of direct browser data modification.

CVSS severity4.3
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Address bar spoofing in Opera through 53 on Android allows remote attackers to display a spoofed URL via mishandled Unicode directionality. The address-bar rendering path mishandles right-to-left Unicode characters and the first-strong-character rule when processing numerical IP addresses or alphabetic strings, causing the displayed origin to differ from the actual destination. Exploitation requires a victim to load attacker-controlled web content; the consequence is deceptive URL presentation that can support phishing, without evidence of direct browser data modification.

The record

CVE
CVE-2019-12278
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 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?

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

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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1036Masquerading

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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