What is CVE-2025-9821?

CVE-2025-9821 is a low-severity vulnerability in Mautic, classified under Server-Side Request Forgery (SSRF). CVSS score: 2.7/10. Published 2025-09-03.

How severe is CVE-2025-9821?

Low severity. CVSS v3 base score is 2.7 out of 10.

Is CVE-2025-9821 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Mautic

CVE-2025-9821

SummaryUsers with webhook permissions can conduct SSRF via webhooks. If they have permission to view the webhook logs, the (partial) request response is also disclosed DetailsWhen sending webhooks, the destination is not validated, causing SSRF. ImpactBypass of firewalls to interact with internal services. See https://owasp.org/Top10/A10_2021-Server-Side_Request_Forgery_%28SSRF%29/ for more potential impact. Resources https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html for more information on SSRF and its fix.

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.003 (20.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

Affected products

Mautic — versions >= 4.4.0, >= 5.0.0-alpha, >= 6.0.0-alpha

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security@mautic.org

Frequently asked questions

What is CVE-2025-9821?: CVE-2025-9821 is a low-severity vulnerability in Mautic, classified under Server-Side Request Forgery (SSRF). CVSS score: 2.7/10. Published 2025-09-03.
How severe is CVE-2025-9821?: Low severity. CVSS v3 base score is 2.7 out of 10.
Is CVE-2025-9821 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.