CVE-2023-47324Public exploitNetwork attack vector

Administrator takeover via incompletely sanitized messages

Published Dec 13, 2023 · Updated Jul 9, 2026

Stored XSS in Silverpeas Core 6.3.1 allows remote authenticated users to execute JavaScript when a recipient opens a crafted message. The message filter blocks script tags but stores other event-handler markup in the content field, which is rendered without complete HTML sanitization. Any user can send the payload to an administrator; viewing it runs in that administrator's browser and can grant the sender administrative access.

CVSS severity5.4
Medium
EPSS probability0.48%
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 Silverpeas Core 6.3.1 allows remote authenticated users to execute JavaScript when a recipient opens a crafted message. The message filter blocks script tags but stores other event-handler markup in the content field, which is rendered without complete HTML sanitization. Any user can send the payload to an administrator; viewing it runs in that administrator's browser and can grant the sender administrative access.

The record

CVE
CVE-2023-47324
Published
Dec 13, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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')
T1203Exploitation for Client Execution

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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