CVE-2003-1271: Cross-site scripting vulnerability (XSS) in AN HTTP 1.41e allows remote attackers to execute arbitrary web scr

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MEDIUM 4.3DOWNGRADE

CVE-2003-1271 is a medium-severity flaw (CVSS 4.3) affecting an-http. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting vulnerability (XSS) in AN HTTP 1.41e allows remote attackers to execute arbitrary web script or HTML as other users via a URL containing the script.

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	1.8% (top 22%)
CISA exploited list	No
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: an

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

an an-http DOWNGRADE

Affected: 1.41e

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.41e

1. Check installed version

apt-cache policy an-http || rpm -q an-http || an-http --version

2. No fixed release: DOWNGRADE to a release before 1.41e (Debian / Ubuntu)

apt-cache madison an-http sudo apt install an-http=<VERSION_BEFORE_1.41e> sudo apt-mark hold an-http

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

dnf --showduplicates list an-http sudo dnf downgrade an-http-<VERSION_BEFORE_1.41e> sudo dnf versionlock add an-http

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: AN HTTPD 1.41 e - Cross-Site Scripting

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-2003-1271?

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

Is CVE-2003-1271 being exploited?

CVE-2003-1271 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-2003-1271 affect?

CVE-2003-1271 affects an-http. Severity is medium (CVSS 4.3). Cross-site scripting vulnerability (XSS) in AN HTTP 1.41e allows remote attackers to execute arbitrary web script or HTML as other users via a URL containing the script.

How urgent is CVE-2003-1271?

Priority 40/100. Public exploit reference

Related CVEs

CVE-2003-1270 MEDIUM 5.0 DOWNGRADE AN HTTP 1.41e allows remote attackers to cause a denial of service (borken pipe) via an HTTP request to aux.cg
CVE-2003-1269 MEDIUM 5.0 DOWNGRADE AN HTTP 1.41e allows remote attackers to obtain the root web server path via an HTTP request with a long argum

References

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