CVE-2026-5347Network attack vector

Unauthenticated settings update via unchecked POST parameter

Published Apr 24, 2026 · Updated Apr 24, 2026

Missing authorization in HM Plugin Books Gallery 4.8.0 and earlier allows remote attackers to alter the book post-type slug. The admin_init handler tests only for a permalink_structure POST parameter, then writes its value to wbg_cpt_slug without a capability check or nonce verification. No account or user interaction is required, and changing the stored slug changes generated book URLs and breaks existing links without exposing content or executing code.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in HM Plugin Books Gallery 4.8.0 and earlier allows remote attackers to alter the book post-type slug. The admin_init handler tests only for a permalink_structure POST parameter, then writes its value to wbg_cpt_slug without a capability check or nonce verification. No account or user interaction is required, and changing the stored slug changes generated book URLs and breaks existing links without exposing content or executing code.

The record

CVE
CVE-2026-5347
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
HM Plugin
Product
Books Gallery
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record 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=0 <=4.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HM Plugin · Books Galleryversion=0 <=4.8.0

Published CVSS scores

5.3WordfenceCVSS: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

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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