How severe is CVE-2021-42752?

CVE-2021-42752 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-42752 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42752?

CVE-2021-42752 affects Fortinet Fortiwlm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42752?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-42752 published?

CVE-2021-42752 was published on 2021-12-08 and last updated on 2026-06-17.

CVE-2021-42752

CVE-2021-42752 is a medium-severity vulnerability in Fortinet Fortiwlm with a CVSS 3.x base score of 5.4. 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: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortiwlm
Published: 2021-12-08
Last modified: 2026-06-17

Description

A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWLM version 8.6.1 and below allows attacker to execute malicious javascript code on victim's host via crafted HTTP requests

Frequently asked questions

What is CVE-2021-42752?: A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWLM version 8.6.1 and below allows attacker to execute malicious javascript code on victim's host via crafted HTTP requests
How severe is CVE-2021-42752?: CVE-2021-42752 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-42752 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42752?: CVE-2021-42752 affects Fortinet Fortiwlm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42752?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-42752 published?: CVE-2021-42752 was published on 2021-12-08 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-21-111

Affected products (1)

cpe:2.3:a:fortinet:fortiwlm:*:*:*:*:*:*:*:*

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