CVE-2023-30789Public exploitNetwork attack vector

Stored XSS via client-side template evaluation

Published May 8, 2023 · Updated Feb 3, 2025

Stored XSS in work details in Butterfly Effect Pte. Ltd. Monica 4.0.0 allows remote authenticated users to execute JavaScript. The people/:id/work endpoint stores job and company values without neutralizing template expressions, and the client evaluates them as code. An account and a victim viewing the modified contact are required; the script runs in the victim's session and can issue state-changing requests.

CVSS severity5.4
Medium
EPSS probability0.67%
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 work details in Butterfly Effect Pte. Ltd. Monica 4.0.0 allows remote authenticated users to execute JavaScript. The people/:id/work endpoint stores job and company values without neutralizing template expressions, and the client evaluates them as code. An account and a victim viewing the modified contact are required; the script runs in the victim's session and can issue state-changing requests.

The record

CVE
CVE-2023-30789
Published
May 8, 2023
Updated
Feb 3, 2025
Vendor
Butterfly Effect Pte. Ltd.
Product
Monica
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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=4.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Butterfly Effect Pte. Ltd. · Monicaversion=4.0.0

Published CVSS scores

8.0Fluid AttacksCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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