CVE-2023-1146Public exploitNetwork attack vector

Stored script execution via unescaped configuration values

Published Mar 2, 2023 · Updated Mar 7, 2025

Stored cross-site scripting in FlatPress before 1.3 allows remote authenticated users to execute script through configuration values. The configuration panel's onsave() handler stores author and email POST values without HTML encoding, allowing later rendering as active markup. An authenticated account able to save general configuration is required, and execution can expose or alter data available to a victim's browser session.

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 cross-site scripting in FlatPress before 1.3 allows remote authenticated users to execute script through configuration values. The configuration panel's onsave() handler stores author and email POST values without HTML encoding, allowing later rendering as active markup. An authenticated account able to save general configuration is required, and execution can expose or alter data available to a victim's browser session.

The record

CVE
CVE-2023-1146
Published
Mar 2, 2023
Updated
Mar 7, 2025
Vendor
FlatPress
Product
FlatPress
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2025Record 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 <1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FlatPress · FlatPressversion=unspecified <1.3

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/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')
T1189Drive-by Compromise

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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