CVE-2023-27089Public exploitNetwork attack vector

Session-cookie disclosure via stored username script

Published Apr 4, 2023 · Updated Feb 14, 2025

Stored XSS in Ehuacui BBS allows remote authenticated users to expose session cookies by registering a crafted username. The login-success view renders the stored username as active markup without neutralizing its script content, so the payload executes in a viewer's browser. Registration access and a subsequent user login are required; execution can disclose that viewer's cookie data and disrupt the browser session.

CVSS severity8.2
High
EPSS probability0.42%
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 Ehuacui BBS allows remote authenticated users to expose session cookies by registering a crafted username. The login-success view renders the stored username as active markup without neutralizing its script content, so the payload executes in a viewer's browser. Registration access and a subsequent user login are required; execution can disclose that viewer's cookie data and disrupt the browser session.

The record

CVE
CVE-2023-27089
Published
Apr 4, 2023
Updated
Feb 14, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H
8.2NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1539Steal Web Session Cookie

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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