CVE-2020-35124

CRITICAL

A cross-site scripting (XSS) vulnerability in the assets component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript through the Referer header of asset downloads.

Affects 1 product across 1 vendor.

CVSS 3.19.6
EPSS2.4%
Percentile84th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, requires user interaction, can impact systems beyond the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-79: Cross-Site Scripting (XSS)

Attacker injects malicious scripts into web pages viewed by other users, executing in the victim's browser context.

Related Attack Patterns (CAPEC)
CAPEC-85 AJAX Footprinting
via CWE-79
CAPEC-209 XSS Using MIME Type Mismatch
via CWE-79
CAPEC-588 DOM-Based XSS
via CWE-79
CAPEC-591 Reflected XSS
via CWE-79
CAPEC-592 Stored XSS
via CWE-79
Show all 6
via CWE-79

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A critical cross-site scripting (XSS) vulnerability in the assets component of Mautic before version 3.2.4 allows remote attackers to inject executable JavaScript via the Referer header during asset downloads, potentially leading to unauthorized actions and data theft.

BSID: BS-2021-GLOBAL-082257-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2020-35124?
A critical cross-site scripting (XSS) vulnerability in the assets component of Mautic before version 3.2.4 allows remote attackers to inject executable JavaScript via the Referer header during asset downloads, potentially leading to unauthorized actions and data theft.
What is the CVSS score for CVE-2020-35124?
CVE-2020-35124 has CVSS 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS: 2.4%.
Is CVE-2020-35124 actively exploited?
No confirmed active exploitation of CVE-2020-35124 as of 2026-09-25.
How do I remediate CVE-2020-35124?
Priority: IMMEDIATE. PSIRT: [email protected]
What systems are affected by CVE-2020-35124?
CVE-2020-35124 affects Acquia Mautic.
Vulnerability Details
CVE IDCVE-2020-35124
BSIDBS-2021-GLOBAL-082257-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Published2021-01-28
Last Modified2026-06-17
ICS Relevance0%
Weakness (CWE)
Cross-Site Scripting (XSS)
SourceNVD
Official Description

A cross-site scripting (XSS) vulnerability in the assets component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript through the Referer header of asset downloads.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability exists in the handling of the Referer header when downloading assets in Mautic. An attacker can craft a malicious Referer header that includes JavaScript code, which is then executed in the context of the victim's browser.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Acquia Mautic < 3.2.4
Remediation

No official vendor advisory link on record. See the CVE record →

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 2087 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash185085ab87cfe57a662f9b6a0e37a9cb09d0bbff70c77d649fc6889bf76c8936e954a9c6ff81ebdf09c0d3ea04866263d93b8c0490d7385206945addef19a70e
Related CVEs affecting Acquia
CVE-2024-47051 9.9 This advisory addresses two critical security vulnerabilities present in Maut... CVE-2020-35125 9.6 A cross-site scripting (XSS) vulnerability in the forms component of Mautic b... CVE-2022-25769 9.1 ImpactThe default .htaccess file has some restrictions in the access to PHP f... CVE-2021-27915 9.0 Prior to the patched version, there is an XSS vulnerability in the descriptio... CVE-2020-35128 9.0 Mautic before 3.2.4 is affected by stored XSS. An attacker with permission to...
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