CVE-2023-0949Public exploitNetwork attack vector

Reflected XSS via unencoded listing tags

Published Feb 22, 2023 · Updated Mar 12, 2025

Reflected XSS in Modoboa before 2.0.5 allows remote authenticated users to execute script in another user's browser through a crafted tag. The listing.js make_tag function assigns attacker-controlled tag text to jQuery's html property without encoding it for HTML output. Administrator-level access is required to supply the tag, and another user must render it before script can read or alter data available to that browser session.

CVSS severity4.8
Medium
EPSS probability0.50%
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 Modoboa before 2.0.5 allows remote authenticated users to execute script in another user's browser through a crafted tag. The listing.js make_tag function assigns attacker-controlled tag text to jQuery's html property without encoding it for HTML output. Administrator-level access is required to supply the tag, and another user must render it before script can read or alter data available to that browser session.

The record

CVE
CVE-2023-0949
Published
Feb 22, 2023
Updated
Mar 12, 2025
Vendor
Modoboa
Product
Modoboa
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Modoboa · Modoboaversion=unspecified <2.0.5

Published CVSS scores

4.8huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.6GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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 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')
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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