CVE-2023-1789

Stored XSS via unescaped currency fields

Published Apr 1, 2023 · Updated Feb 11, 2025

Stored XSS in Firefly III before 6.0.0 allows local users with high privileges to execute scripts through crafted currency fields. TransactionCurrencyFactory::create and CurrencyUpdateService::update stored code, symbol, and name values without HTML escaping. A high-privileged user must create or edit a currency, and another user must view the value, exposing that browser session's accessible data and actions.

CVSS severity5.2
Medium
EPSS probability0.34%
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 Firefly III before 6.0.0 allows local users with high privileges to execute scripts through crafted currency fields. TransactionCurrencyFactory::create and CurrencyUpdateService::update stored code, symbol, and name values without HTML escaping. A high-privileged user must create or edit a currency, and another user must view the value, exposing that browser session's accessible data and actions.

The record

CVE
CVE-2023-1789
Published
Apr 1, 2023
Updated
Feb 11, 2025
Vendor
Firefly III
Product
Firefly III
Classifications
CWE-20, T1059.007
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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 <6.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Firefly III · Firefly IIIversion=unspecified <6.0.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.2huntr.dev CNACVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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