CVE-2024-11182: MDaemon Email Server exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

An XSS issue was discovered in MDaemon Email Server before version 24.5.1c. An attacker can send an HTML e-mail message with JavaScript in an img tag. This could allow a remote attacker to load arbitrary JavaScript code in the context of a webmail user’s browser window.

Description quoted from the CVE record (assigned by ESET, published 2024-11-15).

Weakness: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or ‘Cross-site Scripting’)

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing no privileges and a user must take an action. Impact: confidentiality low, integrity low, availability none. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since: 2025-05-19
US federal deadline: 2025-06-09
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-07577, CNNVD-202411-2033, EUVD-2024-33681, GHSA-q3fg-4x56-mx94

VEDAS cluster: VEDAS:FLAMINGBASILISK

Exploit Observer links 5 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (5)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Research and write-ups (4)

Research or write-up: https://ptsecurity.com/research/trending-vulnerabilities/CVE-2024-11182
Research or write-up: https://ptsecurity.com/ru-ru/research/trending-vulnerabilities/CVE-2024-11182
Research or write-up: https://www.ptsecurity.com/research/trending-vulnerabilities/CVE-2024-11182
Research or write-up: https://www.ptsecurity.com/ru-ru/research/trending-vulnerabilities/CVE-2024-11182

Vulnerability databases and vendor advisories (6)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2024-33681
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-q3fg-4x56-mx94
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-11182
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-11182
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202411-2033
Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2024-11182

45 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.333
likely to be attacked soon
VEDAS: 0.989
strong exploit evidence
On CISA KEV: Yes, since 2025-05-19
Detection rule: Nuclei · Suricata

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish. The vertical line is the day CISA added it to its exploited list.

Who is affected

Product	Affected	Not affected
MDaemon Email Server	up to and including 24.5.0	24.5.1 is not affected

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: mdaemon mdaemon, mdaemon_technologies mdaemon.

How to fix it

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Vendor guidance:

How to detect it

Nuclei template (active check)

MDaemon Email - Cross-Site Scripting
An XSS issue was discovered in MDaemon Email Server before version 24.5.1c. An attacker can send an HTML e-mail message with JavaScript in an img tag.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /index.php?q=); it decides using status, word matchers. Severity in the template: medium. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash

nuclei -u https://your-host -t CVE-2024-11182.yaml

Show the template (38 lines)

yaml

id: CVE-2024-11182

info:
  name: "MDaemon Email - Cross-Site Scripting"
  author: vedas-arpsyndicate
  severity: medium
  description: |
    An XSS issue was discovered in MDaemon Email Server before version 24.5.1c. An attacker can send an HTML
    e-mail message with JavaScript in an img tag.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2024-11182&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=mdaemon&match=exact
  classification:
    cvss-score: 5.3
    cve-id: CVE-2024-11182
    cwe-id: CWE-79
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2024,mdaemon,xss

http:
  - method: GET
    path:
      - '{{BaseURL}}/index.php?q="><script>confirm(97j0qy8h)</script>'
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"><script>confirm(97j0qy8h)</script>'
      - type: word
        part: header
        words:
          - "text/html"
      - type: status
        status:
          - 200

CVE-2024-11182.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2024-11182 MDaemon Email - Cross-Site Scripting. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2024-11182 MDaemon Email - Cross-Site Scripting"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"index.php"; nocase; fast_pattern; content:"<script"; nocase; classtype:web-application-attack; reference:cve,CVE-2024-11182; reference:url,https://www.exploit.observer/?keyword=CVE-2024-11182&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=mdaemon&match=exact; sid:1006192; rev:2;)

CVE-2024-11182.rules on GitHub

References

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-11182 (government-resource)

Other references

https://files.mdaemon.com/mdaemon/beta/RelNotes_en.html

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.