CVE-2025-48941Network attack vector

Hidden thread-title disclosure via search response oracle

Published Jun 2, 2025 · Updated Jun 2, 2025

Information disclosure in MyBB before 1.8.39 allows remote attackers to infer hidden thread titles through search responses. Internal queries in inc/functions_search.php omit the thread-visibility predicate, and differing redirect behavior reveals whether a title search matched. Exploitation requires search access and general access to the containing forum; it reveals title existence but not post content or other protected data.

CVSS severity5.3
Medium
EPSS probability0.34%
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 MyBB before 1.8.39 allows remote attackers to infer hidden thread titles through search responses. Internal queries in inc/functions_search.php omit the thread-visibility predicate, and differing redirect behavior reveals whether a title search matched. Exploitation requires search access and general access to the containing forum; it reveals title existence but not post content or other protected data.

The record

CVE
CVE-2025-48941
Published
Jun 2, 2025
Updated
Jun 2, 2025
Vendor
MyBB
Product
MyBB
Classifications
CWE-1230, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2025Record 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=< 1.8.39

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MyBB · MyBBversion=< 1.8.39

Published CVSS scores

5.3GitHub, Inc.CVSS: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.

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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-1230Exposure of Sensitive Information Through Metadata
T1190Exploit Public-Facing Application

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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