CVE-2002-1986: Perception LiteServe 2.0 through 2.0.1 allows remote attackers to obtain the source code of CGI scripts via an

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MEDIUM 5.0DOWNGRADE

CVE-2002-1986 is a medium-severity flaw (CVSS 5.0) affecting liteserve. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Perception LiteServe 2.0 through 2.0.1 allows remote attackers to obtain the source code of CGI scripts via an HTTP request with a trailing dot (".").

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	6.7% (top 6%)
CISA exploited list	No
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: perception

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

perception liteserve DOWNGRADE

Affected: 2.0 · 2.0.1 · 2.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison liteserve sudo apt install liteserve=<VERSION_BEFORE_2.0> sudo apt-mark hold liteserve

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

dnf --showduplicates list liteserve sudo dnf downgrade liteserve-<VERSION_BEFORE_2.0> sudo dnf versionlock add liteserve

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: Perception LiteServe 2.0 - CGI Source Disclosure

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-2002-1986?

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

Is CVE-2002-1986 being exploited?

CVE-2002-1986 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-2002-1986 affect?

CVE-2002-1986 affects liteserve. Severity is medium (CVSS 5.0). Perception LiteServe 2.0 through 2.0.1 allows remote attackers to obtain the source code of CGI scripts via an HTTP request with a trailing dot (".").

How urgent is CVE-2002-1986?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2003-1144 HIGH 10.0 DOWNGRADE Buffer overflow in the log viewing interface in Perception LiteServe 1.25 through 2.2 allows remote attackers
CVE-2002-2406 MEDIUM 5.0 DOWNGRADE Buffer overflow in HTTP server in LiteServe 2.0, 2.0.1 and 2.0.2 allows remote attackers to cause a denial of
CVE-2002-2369 MEDIUM 5.0 DOWNGRADE Perception LiteServe 2.0 allows remote attackers to read password protected files via a leading "/./" in a URL
CVE-2002-2192 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Perception LiteServe 2.0.1 allows remote attackers to execute arbi
CVE-2001-0795 HIGH 7.5 DOWNGRADE Perception LiteServe 1.25 allows remote attackers to obtain source code of CGI scripts via URLs that contain M

References

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