CVE-2023-4913Public exploitNetwork attack vector

Browser script execution via unescaped request path

Published Sep 12, 2023 · Updated Sep 26, 2024

Reflected XSS in Cecil before 7.47.1 allows remote attackers to execute script in a user's browser through a crafted preview-server URL. The built-in resources/server/router.php decodes the HTTP request path and places it into server output without HTML escaping. Exploitation requires a victim to follow the attacker-controlled URL; successful script execution can read or alter browser-accessible data in the preview server's origin.

CVSS severity6.1
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cecil before 7.47.1 allows remote attackers to execute script in a user's browser through a crafted preview-server URL. The built-in resources/server/router.php decodes the HTTP request path and places it into server output without HTML escaping. Exploitation requires a victim to follow the attacker-controlled URL; successful script execution can read or alter browser-accessible data in the preview server's origin.

The record

CVE
CVE-2023-4913
Published
Sep 12, 2023
Updated
Sep 26, 2024
Vendor
Cecilapp
Product
Cecil
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=unspecified <7.47.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cecilapp · Cecilversion=unspecified <7.47.1

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1huntr.devCVSS:3.0/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1204.001User Execution: Malicious Link

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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