CVE-2024-3277Network attack vector

Subscriber-level data modification via unchecked AJAX handler

Published May 30, 2024 · Updated Apr 8, 2026

Missing authorization in i-magazine AG Yumpu E-Paper publishing 2.0.24 and earlier allows remote authenticated users to modify data. The ajax_handler function processes subscriber-initiated AJAX requests without checking the caller's capability before uploading and publishing PDFs or replacing the configured API key. A valid WordPress account with subscriber-level access is required; exploitation can publish attacker-selected documents and alter the site's Yumpu integration configuration.

CVSS severity5.0
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in i-magazine AG Yumpu E-Paper publishing 2.0.24 and earlier allows remote authenticated users to modify data. The ajax_handler function processes subscriber-initiated AJAX requests without checking the caller's capability before uploading and publishing PDFs or replacing the configured API key. A valid WordPress account with subscriber-level access is required; exploitation can publish attacker-selected documents and alter the site's Yumpu integration configuration.

The record

CVE
CVE-2024-3277
Published
May 30, 2024
Updated
Apr 8, 2026
Vendor
i-magazine AG
Product
Yumpu E-Paper publishing
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE 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 <=2.0.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

i-magazine AG · Yumpu E-Paper publishingversion=0 <=2.0.24

Published CVSS scores

5.0WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

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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