CVE-2002-1494: Cross-site scripting (XSS) vulnerabilities in Aestiva HTML/OS allows remote attackers to insert arbitrary HTML

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MEDIUM 4.3DOWNGRADE

CVE-2002-1494 is a medium-severity flaw (CVSS 4.3) affecting html os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerabilities in Aestiva HTML/OS allows remote attackers to insert arbitrary HTML or script by inserting the script after a trailing / character, which inserts the script into the resulting error message.

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	3.5% (top 11%)
CISA exploited list	No
Published	2003-04-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: aestiva

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

Am I affected?

Timeline

2003-04-02 05:00 UTCPublished CVE record published
2026-06-16 21:59 UTCUpdated Record last modified

aestiva html os DOWNGRADE

Affected: 2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy html-os || rpm -q html-os || html-os --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison html-os sudo apt install html-os=<VERSION_BEFORE_2.4> sudo apt-mark hold html-os

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

dnf --showduplicates list html-os sudo dnf downgrade html-os-<VERSION_BEFORE_2.4> sudo dnf versionlock add html-os

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: Aestiva HTML/OS 2.4 - 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-2002-1494?

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

Is CVE-2002-1494 being exploited?

CVE-2002-1494 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-2002-1494 affect?

CVE-2002-1494 affects html os. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerabilities in Aestiva HTML/OS allows remote attackers to insert arbitrary HTML or script by inserting the script after a trailing / character, which inserts the script into the resulting error message.

How urgent is CVE-2002-1494?

Priority 42/100. Public exploit reference

References

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