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Vulnerability details: VCID-s7r1-3b25-bbe6
Vulnerability ID VCID-s7r1-3b25-bbe6
Aliases CVE-2025-9823
GHSA-9v8p-m85m-f7mm
Summary Mautic vulnerable to reflected XSS in lead:addLeadTags - Quick Add A Cross-Site Scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in the context of another user’s session. This occurs because user-supplied input is reflected back in the server’s response without proper sanitization or escaping, potentially enabling malicious actions such as session hijacking, credential theft, or unauthorized actions in the application.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00088 https://api.first.org/data/v1/epss?cve=CVE-2025-9823
cvssv4 4.8 https://github.com/mautic/mautic
generic_textual MODERATE https://github.com/mautic/mautic
cvssv4 4.8 https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
generic_textual MODERATE https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
ssvc Track https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
cvssv4 4.8 https://nvd.nist.gov/vuln/detail/CVE-2025-9823
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2025-9823
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2025-9823
https://github.com/mautic/mautic
CVE-2025-9823 https://nvd.nist.gov/vuln/detail/CVE-2025-9823
GHSA-9v8p-m85m-f7mm https://github.com/advisories/GHSA-9v8p-m85m-f7mm
GHSA-9v8p-m85m-f7mm https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/mautic/mautic
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

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none

present

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passive

active

high

low

none

high

low

none

high

low

none

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low

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

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low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-09-03T17:32:56Z/ Found at https://github.com/mautic/mautic/security/advisories/GHSA-9v8p-m85m-f7mm
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2025-9823
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.25229
EPSS Score 0.00088
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:24:55.892620+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/packagist/mautic/core/CVE-2025-9823.yml 38.6.0