CVE-2025-8787Public exploitNetwork attack vector

Stored XSS via unsanitized activity content

Published Aug 10, 2025 · Updated Aug 12, 2025

Stored XSS in i-Diário 1.5.0 and earlier allows remote authenticated users to execute scripts in other users' browsers. The /registros-de-conteudos-por-disciplina/[ID] endpoint stores the Registro de atividades and Conteúdos fields without adequate validation or sanitization and later renders the saved input. A low-privileged account must save a crafted value, and script execution occurs when another user opens the affected page.

CVSS severity5.4
Medium
EPSS probability0.29%
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 i-Diário 1.5.0 and earlier allows remote authenticated users to execute scripts in other users' browsers. The /registros-de-conteudos-por-disciplina/[ID] endpoint stores the Registro de atividades and Conteúdos fields without adequate validation or sanitization and later renders the saved input. A low-privileged account must save a crafted value, and script execution occurs when another user opens the affected page.

The record

CVE
CVE-2025-8787
Published
Aug 10, 2025
Updated
Aug 12, 2025
Vendor
Portábilis
Product
i-Diário
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0
  2. Affected versionversion=1.1
  3. Affected versionversion=1.2
  4. Affected versionversion=1.3
  5. Affected versionversion=1.4
  6. Affected versionversion=1.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Portábilis · i-Diárioversion=1.0; version=1.1; version=1.2; version=1.3; version=1.4; version=1.5.0

Published CVSS scores

4.0VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
2.0VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

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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