CVE-2020-26564Public exploitNetwork attack vector

Authenticated server-file disclosure via survey-template XXE

Published Jul 31, 2021 · Updated Aug 4, 2024

XXE in ObjectPlanet Opinio before 7.15 allows remote authenticated users to read server files through a crafted survey template. The import workflow accepts an XML template linked to an attacker-edited CSS file containing an external entity, and previewSurvey expands that entity. Survey administration access is required to modify, import, and preview the files; the demonstrated consequence is server-file disclosure.

CVSS severity6.5
Medium
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in ObjectPlanet Opinio before 7.15 allows remote authenticated users to read server files through a crafted survey template. The import workflow accepts an XML template linked to an attacker-edited CSS file containing an external entity, and previewSurvey expands that entity. Survey administration access is required to modify, import, and preview the files; the demonstrated consequence is server-file disclosure.

The record

CVE
CVE-2020-26564
Published
Jul 31, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, CAPEC-221, T1190, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 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 exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
CAPEC-221Data Serialization External Entities Blowup
T1190Exploit Public-Facing Application
T1005Data from Local System

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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