CVE-2019-12816: Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and exe

Q: How do I fix CVE-2019-12816?

znc: upgrade to newer than 1.7.3. Exact commands for each OS are on this page.

Q: Is CVE-2019-12816 being exploited?

CVE-2019-12816 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-12816 affect?

CVE-2019-12816 affects znc. Severity is high (CVSS 8.8). Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.

Q: How urgent is CVE-2019-12816?

Priority 53/100. High severity; EPSS top 9%: very likely to be exploited

This month

HIGH 8.8UPGRADE

CVE-2019-12816 is a high-severity flaw (CVSS 8.8) affecting znc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-20
Published	2019-06-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: znc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-06-15 16:29 UTCPublished CVE record published
2026-06-17 02:15 UTCUpdated Record last modified

znc znc UPGRADE

Affected: <= 1.7.3

Fixed in: newer than 1.7.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy znc || rpm -q znc || znc --version

2. UPGRADE to newer than 1.7.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade znc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade znc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-12816?

znc: upgrade to newer than 1.7.3. Exact commands for each OS are on this page.

Is CVE-2019-12816 being exploited?

CVE-2019-12816 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-12816 affect?

CVE-2019-12816 affects znc. Severity is high (CVSS 8.8). Modules.cpp in ZNC before 1.7.4-rc1 allows remote authenticated non-admin users to escalate privileges and execute arbitrary code by loading a module with a crafted name.

How urgent is CVE-2019-12816?

Priority 53/100. High severity; EPSS top 9%: very likely to be exploited

Related CVEs

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CVE-2019-9917 MEDIUM 6.5 UPGRADE MITIGATE ZNC before 1.7.3-rc1 allows an existing remote user to cause a Denial of Service (crash) via invalid encoding.
CVE-2018-14056 MEDIUM 5.3 UPGRADE MITIGATE ZNC before 1.7.1-rc1 is prone to a path traversal flaw via ../ in a web skin name to access files outside of t
CVE-2018-14055 MEDIUM 6.5 UPGRADE MITIGATE ZNC before 1.7.1-rc1 does not properly validate untrusted lines coming from the network, allowing a non-admin
CVE-2014-9403 MEDIUM 4.0 UPGRADE The CWebAdminMod::ChanPage function in modules/webadmin.cpp in ZNC before 1.4 allows remote authenticated user

References

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