CVE-2023-5689Public exploitNetwork attack vector

Browser script execution via unescaped form errors

Published Oct 20, 2023 · Updated Sep 11, 2024

Cross-site scripting in Modoboa before 2.2.2 allows remote authenticated users to execute script through crafted profile input. The generic_field.html template marked validation errors as safe, so attacker-controlled profile-language error text was inserted without HTML escaping. Exploitation requires a low-privileged account and user interaction; injected script can read page data and issue same-origin actions in the victim's session.

CVSS severity7.5
High
EPSS probability0.51%
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 Modoboa before 2.2.2 allows remote authenticated users to execute script through crafted profile input. The generic_field.html template marked validation errors as safe, so attacker-controlled profile-language error text was inserted without HTML escaping. Exploitation requires a low-privileged account and user interaction; injected script can read page data and issue same-origin actions in the victim's session.

The record

CVE
CVE-2023-5689
Published
Oct 20, 2023
Updated
Sep 11, 2024
Vendor
Modoboa
Product
Modoboa
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=0 <2.2.2
  2. Affected versionversion=unspecified <2.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Modoboa · Modoboaversion=0 <2.2.2; version=unspecified <2.2.2

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
7.1huntr.devCVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
7.5GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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