CVE-2001-0521

NONECVSS 0.0Weaponized

0.0

Aladdin eSafe Gateway versions 3.0 and earlier allows a remote attacker to circumvent HTML SCRIPT filtering via the UNICODE encoding of SCRIPT tags within the HTML document.

CVSS v3: —
EG Score: —
EPSS: 91.5%
KEV: Not listed

Published

August 14, 2001

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://archives.neohapsis.com/archives/bugtraq/2001-05/0285.html
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/6580
af854a3a-2127-422b-91ae-364da2661108http://archives.neohapsis.com/archives/bugtraq/2001-05/0285.html
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/6580

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-20891✓ verified
First seen May 29, 2001
Aladdin Knowledge Systems eSafe Gateway 3.0 - Unicode Script-filtering Bypass
Open source ↗

Frequently asked(4)

What is CVE-2001-0521?

CVE-2001-0521 is a none vulnerability published on August 14, 2001. Aladdin eSafe Gateway versions 3.0 and earlier allows a remote attacker to circumvent HTML SCRIPT filtering via the UNICODE encoding of SCRIPT tags within the HTML document.

When was CVE-2001-0521 disclosed?

CVE-2001-0521 was first published in the National Vulnerability Database on August 14, 2001, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2001-0521 actively exploited?

CVE-2001-0521 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2001-0521?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0521, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2001-0521

📅 Published

🔄 Last Modified

🔗 References (4)