CVE-2021-4311

Authenticated data disclosure via external entity resolution

Published Jan 9, 2023 · Updated Apr 9, 2025

XXE in Talend Open Studio for MDM allows remote authenticated users to read local data by submitting crafted XML to the XML Handler. The handler processes untrusted XML while permitting external entity resolution, allowing entity references to access resources available to the process. Exploitation requires adjacent access and low privileges; published evidence supports bounded confidentiality, integrity, and availability effects but does not identify the exposed interface.

CVSS severity5.5
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Talend Open Studio for MDM allows remote authenticated users to read local data by submitting crafted XML to the XML Handler. The handler processes untrusted XML while permitting external entity resolution, allowing entity references to access resources available to the process. Exploitation requires adjacent access and low privileges; published evidence supports bounded confidentiality, integrity, and availability effects but does not identify the exposed interface.

The record

CVE
CVE-2021-4311
Published
Jan 9, 2023
Updated
Apr 9, 2025
Vendor
Talend
Product
Talend Open Studio for MDM
Classifications
CWE-611
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Talend · Talend Open Studio for MDMversion=n/a

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.9VulDBAV:A/AC:M/Au:S/C:P/I:P/A:P
5.5VulDBCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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