CVE-2023-6826Network attack vector

Arbitrary file upload via unchecked template import

Published Dec 15, 2023 · Updated Apr 8, 2026

Unrestricted file upload in E2Pdf 1.20.25 and earlier allows remote authenticated users to place arbitrary files through template import. The import_action function processes uploaded import content without sufficient file-type validation, allowing prohibited file types to reach the server. An account with a role explicitly granted E2Pdf access is required; code execution additionally depends on the uploaded file being executable by the web server.

CVSS severity7.2
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in E2Pdf 1.20.25 and earlier allows remote authenticated users to place arbitrary files through template import. The import_action function processes uploaded import content without sufficient file-type validation, allowing prohibited file types to reach the server. An account with a role explicitly granted E2Pdf access is required; code execution additionally depends on the uploaded file being executable by the web server.

The record

CVE
CVE-2023-6826
Published
Dec 15, 2023
Updated
Apr 8, 2026
Vendor
E2Pdf
Product
E2Pdf
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2023CVE 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 <=1.20.25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

E2Pdf · E2Pdfversion=0 <=1.20.25

Published CVSS scores

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

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

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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