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🐍 PyPI
Not in CISA KEV
HIGH severity

CVE-2019-19702 — modoboa-dmarc

HIGHFix: modoboa/modoboa-dmarc@14c29e0

CVE-2019-19702 is a high-severity (CVSS 7.5) XML External Entity (XXE) vulnerability in modoboa-dmarc. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for modoboa-dmarc — see the affected versions and patch details below.

Modoboa is vulnerable to an XML External Entity Injection (XXE)

Also known asGHSA-vc42-mgr2-w34rPYSEC-2019-105
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk
0.32%0.87%1.42%1.97%0.8%1.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍modoboa-dmarc

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

The modoboa-dmarc plugin 1.1.0 for Modoboa is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this to perform a denial of service against the DMARC reporting functionality, such as by referencing the /dev/random file within XML documents that are emailed to the address in the rua field of the DMARC records of a domain.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPImodoboa-dmarcall versions1.2.0pip install --upgrade 'modoboa-dmarc==1.2.0'

Affected Products

1 product · 1 configurations
Application
modoboa-dmarcmodoboa
1 version
1.1.0
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The modoboa-dmarc plugin 1.1.0 for Modoboa is vulnerable to an XML Exter…

github.comNVDJul 2021

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for modoboa-dmarc, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update modoboa-dmarc to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-19702 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

The modoboa-dmarc plugin 1.1.0 for Modoboa is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this to perform a denial of service against the DMARC reporting functionality, such as by referencing the /dev/random file within XML documents that are emailed to the address in the rua field of the DMARC records of a domain.
O3 Security · Impact-Aware SCA

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CVE-2019-19702: modoboa-dmarc DoS — Fixed in 1.2.0