CVE-2002-1993: webbbs_post.pl in WebBBS 4 and 5.0 allows remote attackers to execute arbitrary commands via shell metacharact

This week

HIGH 10.0DOWNGRADE

CVE-2002-1993 is a high-severity flaw (CVSS 10.0) affecting affordable web space design webbbs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

webbbs_post.pl in WebBBS 4 and 5.0 allows remote attackers to execute arbitrary commands via shell metacharacters in the followup parameter.

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	11.9% (top 4%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: affordable web space design

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 22:00 UTCUpdated Record last modified

affordable web space design affordable web space design webbbs DOWNGRADE

Affected: 4.0 · 4.1 · 4.2 · 4.10 · 4.11 · 4.12 · 4.20 · 4.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy affordable-web-space-design-webbbs || rpm -q affordable-web-space-design-webbbs || affordable-web-space-design-webbbs --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison affordable-web-space-design-webbbs sudo apt install affordable-web-space-design-webbbs=<VERSION_BEFORE_4.0> sudo apt-mark hold affordable-web-space-design-webbbs

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

dnf --showduplicates list affordable-web-space-design-webbbs sudo dnf downgrade affordable-web-space-design-webbbs-<VERSION_BEFORE_4.0> sudo dnf versionlock add affordable-web-space-design-webbbs

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: WebScripts WebBBS 4.x/5.0 - Remote Command Execution

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-2002-1993?

affordable web space design webbbs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-1993 being exploited?

CVE-2002-1993 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-2002-1993 affect?

CVE-2002-1993 affects affordable web space design webbbs. Severity is high (CVSS 10.0). webbbs_post.pl in WebBBS 4 and 5.0 allows remote attackers to execute arbitrary commands via shell metacharacters in the followup parameter.

How urgent is CVE-2002-1993?

Priority 64/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2003-0479 MEDIUM 4.3 MITIGATE Cross-site scripting (XSS) vulnerability in the guestbook for WebBBS allows remote attackers to insert arbitra

References

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