CVE-2025-8920Public exploitNetwork attack vector

Stored script execution via unsanitized lesson plans

Published Aug 13, 2025 · Updated Aug 15, 2025

Stored XSS in Portábilis i-Diário 1.6 allows remote authenticated users to execute scripts through the Planos de ensino field. The BNCC terms page stores the field without adequate validation or sanitization and later renders it on subject and knowledge-area lesson-plan pages. High-privileged access is required to plant the payload, and another user's page view triggers it in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Portábilis i-Diário 1.6 allows remote authenticated users to execute scripts through the Planos de ensino field. The BNCC terms page stores the field without adequate validation or sanitization and later renders it on subject and knowledge-area lesson-plan pages. High-privileged access is required to plant the payload, and another user's page view triggers it in that user's browser context.

The record

CVE
CVE-2025-8920
Published
Aug 13, 2025
Updated
Aug 15, 2025
Vendor
Portábilis
Product
i-Diário
Classifications
CWE-94, CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Portábilis · i-Diárioversion=1.6

Published CVSS scores

2.4VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.3VulDBAV:N/AC:L/Au:M/C:N/I:P/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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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