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NVD / CVE Program· CNA cisco

CVE-2024-20387: A vulnerability in the web-based management interface of Cisco FMC Software could allow an authenticated, remote attacker to store malicious…

MediumCVSS 5.4 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.37% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Oct 23, 2024
Updated
Jun 17, 2026
EPSS
0.3% · 31th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.4
CNA · cisco
5.4
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-20387

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ciscofirepower management center
ciscosecure firewall management center

Limit the impact of XSS

This is a cross-site scripting (XSS) vulnerability. A well-configured Content-Security-Policy doesn't fix it, but greatly reduces its impact. Check your site's CSP and other security headers for free.

Check security headers

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

  • Cisco Cisco Firepower Management Center

    • 6.2.3.17, 6.2.3.18, 6.4.0.13, 6.4.0.14, 6.4.0.15, 6.4.0.16, 6.4.0.17, 6.4.0.18, 6.6.0, 6.6.0.1, 6.6.1, 6.6.3 … (+26)affected
Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cisco firepower management center6.4.0.17
  • cisco firepower management center6.4.0.18
  • cisco firepower management center6.6.7.2
  • cisco firepower management center7.0.6.1
  • cisco firepower management center7.0.6.2
  • cisco firepower management center7.2.5.1
  • cisco firepower management center7.2.5.2
  • cisco firepower management center7.2.6
  • cisco firepower management center7.2.7
  • cisco firepower management center7.2.8
  • cisco firepower management center7.2.8.1
  • cisco firepower management center7.4.0
  • cisco firepower management center7.4.1
  • cisco firepower management center7.4.1.1
  • cisco secure firewall management center6.2.3.17
  • cisco secure firewall management center6.2.3.18
  • cisco secure firewall management center6.4.0.13
  • cisco secure firewall management center6.4.0.14
  • cisco secure firewall management center6.4.0.15
  • cisco secure firewall management center6.4.0.16

Same product

cisco: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-20379A vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software, formerly Firepower…
    26Monitor
  • CVE-2024-20415A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-20410A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-20372Oct 23, 2024 · A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • ← EarlierCVE-2024-20386Oct 23, 2024 · A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • Later →CVE-2024-20388Oct 23, 2024 · A vulnerability in the password change feature of Cisco Firepower Management Center (FMC) software could allow an unauthenticated, remote…
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-203720 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-203860 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-204090 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-204100 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-204150 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated…
    24Monitor
  • CVE-2024-204030 days apartA vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated…
    21Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records