CVE-2025-58070Network attack vector

Authenticated script execution via HTML attachment preview

Published Oct 24, 2025 · Updated Oct 24, 2025

Stored cross-site scripting in Pleasanter 1.4.20.0 and earlier allows remote authenticated users to execute scripts through attachment previews. The attachment preview renders an uploaded HTML file as active content without neutralizing its embedded script. A logged-in user must upload the file and a logged-in victim must open its preview, exposing the victim to redirects, data access, or unintended administrative actions.

CVSS severity5.1
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Pleasanter 1.4.20.0 and earlier allows remote authenticated users to execute scripts through attachment previews. The attachment preview renders an uploaded HTML file as active content without neutralizing its embedded script. A logged-in user must upload the file and a logged-in victim must open its preview, exposing the victim to redirects, data access, or unintended administrative actions.

The record

CVE
CVE-2025-58070
Published
Oct 24, 2025
Updated
Oct 24, 2025
Vendor
IMPLEM Inc.
Product
Pleasanter
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 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=1.4.20.0 and earlier versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IMPLEM Inc. · Pleasanterversion=1.4.20.0 and earlier versions

Published CVSS scores

5.1JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
6.1JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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