CVE-2023-27527

Local file disclosure via external entity expansion

Published May 10, 2023 · Updated Jan 28, 2025

XXE in Shinseiyo Sogo Soft 7.9A and earlier allows attackers to read arbitrary PC files by supplying a crafted XML file. The published advisory does not identify the parser or import routine; it states that external entity references are not restricted when the file is processed. Exploitation requires a user to process the malicious file, and the documented consequence is local-file disclosure without file modification.

CVSS severity2.5
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in Shinseiyo Sogo Soft 7.9A and earlier allows attackers to read arbitrary PC files by supplying a crafted XML file. The published advisory does not identify the parser or import routine; it states that external entity references are not restricted when the file is processed. Exploitation requires a user to process the malicious file, and the documented consequence is local-file disclosure without file modification.

The record

CVE
CVE-2023-27527
Published
May 10, 2023
Updated
Jan 28, 2025
Vendor
Ministry of Justice of Japan
Product
Shinseiyo Sogo Soft
Classifications
CWE-611, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=(7.9A) and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Ministry of Justice of Japan · Shinseiyo Sogo Softversion=(7.9A) and earlier

Published CVSS scores

2.5CISA-ADPCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
1.2JPCERT/CCAV:L/AC:H/Au:N/C:P/I:N/A:N
2.5JPCERT/CCCVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1204.002Malicious File

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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