How severe is CVE-2024-20387?

CVE-2024-20387 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-2024-20387 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-20387?

CVE-2024-20387 primarily affects Cisco Firepower Management Center. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-20387?

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

Does CVE-2024-20387 have an EU (EUVD) identifier?

Yes. CVE-2024-20387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18102.

When was CVE-2024-20387 published?

CVE-2024-20387 was published on 2024-10-23 and last updated on 2026-06-17.

CVE-2024-20387

CVE-2024-20387 is a medium-severity vulnerability in Cisco Firepower Management Center 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)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-18102
Weakness: CWE-79
Affected product: Cisco Firepower Management Center
Published: 2024-10-23
Last modified: 2026-06-17

Description

A vulnerability in the web-based management interface of Cisco FMC Software could allow an authenticated, remote attacker to store malicious content for use in XSS attacks. This vulnerability is due to improper input sanitization in the web-based management interface of Cisco FMC Software. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to conduct a stored XSS attack on an affected device.

Frequently asked questions

What is CVE-2024-20387?: A vulnerability in the web-based management interface of Cisco FMC Software could allow an authenticated, remote attacker to store malicious content for use in XSS attacks. This vulnerability is due to improper input sanitization in the web-based management interface of Cisco FMC Software. An attacker could exploit this vulnerability by persuading a user to click a malicious link. A successful exploit could allow the attacker to conduct a stored XSS attack on an affected device.
How severe is CVE-2024-20387?: CVE-2024-20387 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-2024-20387 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-20387?: CVE-2024-20387 primarily affects Cisco Firepower Management Center. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-20387?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-20387 have an EU (EUVD) identifier?: Yes. CVE-2024-20387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-18102.
When was CVE-2024-20387 published?: CVE-2024-20387 was published on 2024-10-23 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-infodisc-RL4mJFer

Affected products (38)

cpe:2.3:a:cisco:firepower_management_center:6.4.0.17:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:6.4.0.18:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:6.6.7.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.0.6.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.5.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.5.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.8:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.2.8.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.4.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.4.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_management_center:7.4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.17:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3.18:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.13:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.14:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.15:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.4.0.16:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.0.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.5.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.7:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:6.6.7.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.0.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.2.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.2.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:secure_firewall_management_center:7.3.1.2:*:*:*:*:*:*:*

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