How severe is CVE-2001-0521?

CVE-2001-0521 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0521?

CVE-2001-0521 affects Aladdin Knowledge Systems Esafe Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2001-0521 published?

CVE-2001-0521 was published on 2001-08-14 and last updated on 2026-06-16.

CVE-2001-0521

CVE-2001-0521 is a high-severity vulnerability in Aladdin Knowledge Systems Esafe Gateway with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Aladdin Knowledge Systems Esafe Gateway
Published: 2001-08-14
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2001-0521?: 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.
How severe is CVE-2001-0521?: CVE-2001-0521 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0521?: CVE-2001-0521 affects Aladdin Knowledge Systems Esafe Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2001-0521 published?: CVE-2001-0521 was published on 2001-08-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:aladdin_knowledge_systems:esafe_gateway:3.0:*:*:*:*:*:*:*

More vulnerabilities in Aladdin Knowledge Systems Esafe Gateway

CVE-2003-1449 — High (CVSS 7.5): Aladdin Knowlege Systems eSafe Gateway 3.5.126.0 does not check the entire stream of Content Vectoring Protocol (CVP)…
CVE-2001-0520 — High (CVSS 7.5): Aladdin eSafe Gateway versions 3.0 and earlier allows a remote attacker to circumvent filtering of SCRIPT tags by…
CVE-2001-0519 — High (CVSS 7.5): Aladdin eSafe Gateway versions 2.x allows a remote attacker to circumvent HTML SCRIPT filtering via a special…

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