CVE-2019-25056Network attack vector

Browser-version disclosure via bundled ad-block rules

Published Jan 26, 2022 · Updated Aug 5, 2024

Information disclosure in Bromite through 78.0.3904.130 allows remote attackers to identify its version through crafted web content. The release APK embeds ad-block rules whose resource-blocking decisions expose a version-specific response pattern. Visiting attacker-controlled content is sufficient, and the disclosed version defeats the frozen User-Agent's version concealment without exposing page data.

CVSS severity5.3
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Bromite through 78.0.3904.130 allows remote attackers to identify its version through crafted web content. The release APK embeds ad-block rules whose resource-blocking decisions expose a version-specific response pattern. Visiting attacker-controlled content is sufficient, and the disclosed version defeats the frozen User-Agent's version concealment without exposing page data.

The record

CVE
CVE-2019-25056
Published
Jan 26, 2022
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy

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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