CVE-2024-39031Public exploitNetwork attack vector

Stored XSS via unchecked calendar event fields

Published Jul 9, 2024 · Updated Aug 2, 2024

Stored XSS in Mes Agendas in Silverpeas Core 6.3.5 and earlier allows remote authenticated users to run script in invited users' browsers. The calendar API accepts JSON or XML event titles and descriptions without applying the web filter's injection checks, then renders the stored values in profiles and feeds. A standard account must create an event and invite another domain user; viewing a profile triggers the payload and exposes that user's browser session to script-driven data access or actions.

CVSS severity5.4
Medium
EPSS probability0.77%
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 Mes Agendas in Silverpeas Core 6.3.5 and earlier allows remote authenticated users to run script in invited users' browsers. The calendar API accepts JSON or XML event titles and descriptions without applying the web filter's injection checks, then renders the stored values in profiles and feeds. A standard account must create an event and invite another domain user; viewing a profile triggers the payload and exposes that user's browser session to script-driven data access or actions.

The record

CVE
CVE-2024-39031
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
Silverpeas
Product
Silverpeas
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=0 <=6.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Silverpeas · Silverpeasversion=0 <=6.3.5

Published CVSS scores

5.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4CISA-ADPCVSS: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 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')
T1059.007JavaScript/JScript

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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