CVE-2021-27931Public exploitNetwork attack vector

Unauthenticated file read via external entity resolution

Published Mar 3, 2021 · Updated Aug 3, 2024

Blind XXE in Lumis LumisXP before 10.0.0 allows remote attackers to read local server files or interrupt service through an API request. PageControllerXml.jsp processes attacker-supplied XML for the addPage method and resolves an external entity referenced by the id element. No authentication or user interaction is required; the records do not identify whether denial of service manifests as a hang or crash.

CVSS severity9.1
Critical
EPSS probability18.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Blind XXE in Lumis LumisXP before 10.0.0 allows remote attackers to read local server files or interrupt service through an API request. PageControllerXml.jsp processes attacker-supplied XML for the addPage method and resolves an external entity referenced by the id element. No authentication or user interaction is required; the records do not identify whether denial of service manifests as a hang or crash.

The record

CVE
CVE-2021-27931
Published
Mar 3, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:P
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
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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