Custom Post Type Attachment <= 3.4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via pdf_attachment Shortcode

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Summary

CVECVE-2024-4546
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-05-16 08:15:38 UTC
Updated2026-04-08 19:21:41 UTC
DescriptionThe Custom Post Type Attachment plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'pdf_attachment' shortcode in all versions up to, and including, 3.4.5 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.003110000 probability, percentile 0.542700000 (date 2026-04-12)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Avimegladon Custom Post Type Attachment affected 3.4.5 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/changeset/3087121 af854a3a-2127-422b-91ae-364da2661108 plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/f6ba2907-36f4-4c4d-9e25-d13d3... af854a3a-2127-422b-91ae-364da2661108 www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Francesco Carlucci (en)

Additional Advisory Data

SourceTimeEvent
CNA2024-05-15T18:50:55.000ZDisclosed
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