CVE-2023-35169Public exploitNetwork attack vector

Remote code execution via traversing attachment filenames

Published Jun 23, 2023 · Updated Nov 27, 2024

Path traversal in Webklex PHP-IMAP before 5.3.0 allows remote attackers to write arbitrary files through crafted email attachments. Attachment::save uses an unsanitized attachment filename or fallback mail value as the destination path and permits arbitrary extensions and content. Exploitation requires an application to call Attachment::save with no filename or an unsanitized one; code execution requires the written file to be invoked.

CVSS severity9.0
Critical
EPSS probability3.19%
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 Webklex PHP-IMAP before 5.3.0 allows remote attackers to write arbitrary files through crafted email attachments. Attachment::save uses an unsanitized attachment filename or fallback mail value as the destination path and permits arbitrary extensions and content. Exploitation requires an application to call Attachment::save with no filename or an unsanitized one; code execution requires the written file to be invoked.

The record

CVE
CVE-2023-35169
Published
Jun 23, 2023
Updated
Nov 27, 2024
Vendor
Webklex
Product
PHP-IMAP
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record 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=< 5.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Webklex · PHP-IMAPversion=< 5.3.0

Published CVSS scores

9.0GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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 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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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