CVE-2024-13889Network attack vector

Conditional code execution via serialized WXR metadata

Published Mar 26, 2025 · Updated Apr 8, 2026

PHP object injection in WordPress Importer 0.8.3 and earlier allows remote authenticated users to inject objects through a crafted WXR file. Four metadata import paths pass serialized term, post, and comment values from the WXR document to maybe_unserialize, which instantiates attacker-selected PHP classes. Administrator access is required, and impact depends on another installed plugin or theme supplying a usable POP chain; such a chain can delete files, read sensitive data, or execute code.

CVSS severity7.2
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in WordPress Importer 0.8.3 and earlier allows remote authenticated users to inject objects through a crafted WXR file. Four metadata import paths pass serialized term, post, and comment values from the WXR document to maybe_unserialize, which instantiates attacker-selected PHP classes. Administrator access is required, and impact depends on another installed plugin or theme supplying a usable POP chain; such a chain can delete files, read sensitive data, or execute code.

The record

CVE
CVE-2024-13889
Published
Mar 26, 2025
Updated
Apr 8, 2026
Vendor
WordPress.org
Product
WordPress Importer
Classifications
CWE-502
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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 <=0.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WordPress.org · WordPress Importerversion=0 <=0.8.3

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

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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