CVE-2002-2343: Cross-site scripting (XSS) vulnerability in NOCC 0.9 through 0.9.5 allows remote attackers to inject arbitrary

Routine

MEDIUM 4.3DOWNGRADE

CVE-2002-2343 is a medium-severity flaw (CVSS 4.3) affecting nocc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in NOCC 0.9 through 0.9.5 allows remote attackers to inject arbitrary web script or HTML via email messages.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-79
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nocc

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

nocc nocc DOWNGRADE

Affected: 0.9 · 0.9.1 · 0.9.2 · 0.9.3 · 0.9.4 · 0.9.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.9 (Debian / Ubuntu)

apt-cache madison nocc sudo apt install nocc=<VERSION_BEFORE_0.9> sudo apt-mark hold nocc

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

dnf --showduplicates list nocc sudo dnf downgrade nocc-<VERSION_BEFORE_0.9> sudo dnf versionlock add nocc

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: NOCC 0.9.x - Webmail Script Injection

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-2002-2343?

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

Is CVE-2002-2343 being exploited?

CVE-2002-2343 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-2002-2343 affect?

CVE-2002-2343 affects nocc. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in NOCC 0.9 through 0.9.5 allows remote attackers to inject arbitrary web script or HTML via email messages.

How urgent is CVE-2002-2343?

Priority 39/100. Public exploit reference

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References

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