CVE-2023-29478Public exploitNetwork attack vector

Remote code execution via unsanitized book filenames

Published Apr 7, 2023 · Updated Feb 11, 2025

Path traversal in BiblioCraft before 2.4.6 allows remote attackers to write files outside the book directory and execute code. The server saves written books under world/books using attacker-controlled NBT author and title values without neutralizing ../ sequences, permitting writes into the mods directory. A crafted book can place a mod JAR there, which Forge loads on the next server restart; reachability requires the ability to submit and save the crafted book.

CVSS severity9.8
Critical
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in BiblioCraft before 2.4.6 allows remote attackers to write files outside the book directory and execute code. The server saves written books under world/books using attacker-controlled NBT author and title values without neutralizing ../ sequences, permitting writes into the mods directory. A crafted book can place a mod JAR there, which Forge loads on the next server restart; reachability requires the ability to submit and save the crafted book.

The record

CVE
CVE-2023-29478
Published
Apr 7, 2023
Updated
Feb 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1505
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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?

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

9.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1505Server Software Component

Public exploit references

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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