CVE-2020-27970Network attack vector

Remote address-bar spoofing

Published Sep 13, 2021 · Updated Aug 4, 2024

Address-bar spoofing in Yandex Browser Lite before 20.10.0 allows remote attackers to display a false origin in the browser UI. Yandex has not published the affected component or the operation that mishandles untrusted input. The public record does not state the content, navigation sequence, or user interaction required, so only origin-display integrity is established.

CVSS severity5.3
Medium
EPSS probability1.32%
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 Yandex Browser Lite before 20.10.0 allows remote attackers to display a false origin in the browser UI. Yandex has not published the affected component or the operation that mishandles untrusted input. The public record does not state the content, navigation sequence, or user interaction required, so only origin-display integrity is established.

The record

CVE
CVE-2020-27970
Published
Sep 13, 2021
Updated
Aug 4, 2024
Vendor
Yandex
Product
Yandex Browser Lite
Classifications
CWE-290
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2021CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=All versions prior to version 20.10.0.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Yandex · Yandex Browser Liteversion=All versions prior to version 20.10.0.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing

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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