CVE-2023-40816Public exploitNetwork attack vector

Stored HTML injection via unneutralized milestone names

Published Nov 18, 2023 · Updated Aug 28, 2024

HTML injection in OpenCRX 5.2.0 allows remote attackers to alter rendered Activity Milestone content via its Name field. The Activity Milestone save path stores markup submitted in the Name field and renders it as HTML without neutralization. Access to the web application and a victim viewing the saved milestone are required; demonstrated impact is persistent page-content modification.

CVSS severity6.1
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTML injection in OpenCRX 5.2.0 allows remote attackers to alter rendered Activity Milestone content via its Name field. The Activity Milestone save path stores markup submitted in the Name field and renders it as HTML without neutralization. Access to the web application and a victim viewing the saved milestone are required; demonstrated impact is persistent page-content modification.

The record

CVE
CVE-2023-40816
Published
Nov 18, 2023
Updated
Aug 28, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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