CVE-2013-2130: ZNC 1.0 allows remote authenticated users to cause a denial of service (NULL pointer reference and crash) via

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MEDIUM 4.0DOWNGRADE

CVE-2013-2130 is a medium-severity flaw (CVSS 4.0) affecting znc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZNC 1.0 allows remote authenticated users to cause a denial of service (NULL pointer reference and crash) via a crafted request to the (1) editnetwork, (2) editchan, (3) addchan, or (4) delchan page in modules/webadmin.cpp.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.0 (Medium)
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Published	2014-06-05
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: znc

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-06-05 20:55 UTCPublished CVE record published
2026-06-16 23:52 UTCUpdated Record last modified

znc znc DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison znc sudo apt install znc=<VERSION_BEFORE_1.0> sudo apt-mark hold znc

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list znc sudo dnf downgrade znc-<VERSION_BEFORE_1.0> sudo dnf versionlock add znc

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2013-2130?

znc: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-2130 being exploited?

CVE-2013-2130 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-2013-2130 affect?

CVE-2013-2130 affects znc. Severity is medium (CVSS 4.0). ZNC 1.0 allows remote authenticated users to cause a denial of service (NULL pointer reference and crash) via a crafted request to the (1) editnetwork, (2) editchan, (3) addchan, or (4) delchan page in modules/webadmin.cpp.

How urgent is CVE-2013-2130?

Priority 40/100. Public exploit reference

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References

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