How severe is CVE-2020-35740?

CVE-2020-35740 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2020-35740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35740?

CVE-2020-35740 primarily affects Hgiga Msr45 Isherlock-antispam. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-35740?

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-2020-35740 published?

CVE-2020-35740 was published on 2020-12-31 and last updated on 2026-06-17.

CVE-2020-35740

CVE-2020-35740 is a high-severity vulnerability in Hgiga Msr45 Isherlock-antispam with a CVSS 3.x base score of 7.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v2: 4.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Hgiga Msr45 Isherlock-antispam
Published: 2020-12-31
Last modified: 2026-06-17

Description

HGiga MailSherlock does not validate specific URL parameters properly that allows attackers to inject JavaScript syntax for XSS attacks.

Frequently asked questions

What is CVE-2020-35740?: HGiga MailSherlock does not validate specific URL parameters properly that allows attackers to inject JavaScript syntax for XSS attacks.
How severe is CVE-2020-35740?: CVE-2020-35740 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2020-35740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35740?: CVE-2020-35740 primarily affects Hgiga Msr45 Isherlock-antispam. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-35740?: 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-2020-35740 published?: CVE-2020-35740 was published on 2020-12-31 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-4259-90f23-1.html

Affected products (4)

cpe:2.3:a:hgiga:msr45_isherlock-antispam:*:*:*:*:*:*:*:*
cpe:2.3:a:hgiga:msr45_isherlock-user:*:*:*:*:*:*:*:*
cpe:2.3:a:hgiga:ssr45_isherlock-antispam:*:*:*:*:*:*:*:*
cpe:2.3:a:hgiga:ssr45_isherlock-user:*:*:*:*:*:*:*:*

More vulnerabilities in Hgiga Msr45 Isherlock-antispam

CVE-2020-25848 — Critical (CVSS 9.8): HGiga MailSherlock contains weak authentication flaw that attackers grant privilege remotely with default password…
CVE-2021-22848 — High (CVSS 7.0): HGiga MailSherlock contains a SQL Injection. Remote attackers can inject SQL syntax and execute SQL commands in a URL…
CVE-2020-35743 — High (CVSS 7.0): HGiga MailSherlock contains a SQL injection flaw. Attackers can inject and launch SQL commands in a URL parameter of…
CVE-2020-35742 — High (CVSS 7.0): HGiga MailSherlock contains a vulnerability of SQL Injection. Attackers can inject and launch SQL commands in a URL…
CVE-2020-35741 — High (CVSS 7.0): HGiga MailSherlock does not validate user parameters on multiple login pages. Attackers can use the vulnerability to…

All CVEs affecting Hgiga Msr45 Isherlock-antispam →

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