CVE-2023-47260Network attack vector

Cross-site scripting via unsandboxed inline thumbnails

Published Nov 5, 2023 · Updated Sep 5, 2024

Cross-site scripting in Redmine before 4.2.11 and 5.0.x before 5.0.6 allows remote attackers to run script via thumbnail responses. The attachment and repository controllers served files inline without a restrictive Content Security Policy, allowing active content to execute rather than remain isolated. A user must open the crafted thumbnail; successful execution can read or alter data available to that user's Redmine browser session.

CVSS severity6.1
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Redmine before 4.2.11 and 5.0.x before 5.0.6 allows remote attackers to run script via thumbnail responses. The attachment and repository controllers served files inline without a restrictive Content Security Policy, allowing active content to execute rather than remain isolated. A user must open the crafted thumbnail; successful execution can read or alter data available to that user's Redmine browser session.

The record

CVE
CVE-2023-47260
Published
Nov 5, 2023
Updated
Sep 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 5, 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 National Vulnerability DatabaseCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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