CVE-2020-35125

CRITICAL

A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via mautic[return] (a different attack method than C...

Affects 1 product across 1 vendor.

CVSS 3.19.6
EPSS2.7%
Percentile86th
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 cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via the mautic[return] parameter, enabling potential unauthorized actions and data theft.

BSID: BS-2021-GLOBAL-081833-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2020-35125?
A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via the mautic[return] parameter, enabling potential unauthorized actions and data theft.
What is the CVSS score for CVE-2020-35125?
CVE-2020-35125 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: 2.7%.
Is CVE-2020-35125 actively exploited?
No confirmed active exploitation of CVE-2020-35125 as of 2026-09-25.
How do I remediate CVE-2020-35125?
Priority: IMMEDIATE. PSIRT: [email protected]
What systems are affected by CVE-2020-35125?
CVE-2020-35125 affects Acquia Mautic.
Vulnerability Details
CVE IDCVE-2020-35125
BSIDBS-2021-GLOBAL-081833-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Published2021-02-09
Last Modified2026-06-17
ICS Relevance0%
Weakness (CWE)
Cross-Site Scripting (XSS)
SourceNVD
Official Description

A cross-site scripting (XSS) vulnerability in the forms component of Mautic before 3.2.4 allows remote attackers to inject executable JavaScript via mautic[return] (a different attack method than CVE-2020-35124, but also related to the Referer concept).

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability arises from improper validation and sanitization of the mautic[return] parameter in the forms component. Attackers can exploit this by crafting a malicious URL that, when visited by a user, executes arbitrary JavaScript in the context of the victim's browser session.

Exploitation Likelihood: HIGH

Affected Products
VendorProductAffected Versions
Acquia Mautic < 2.16.5 ≥ 3.0.0, < 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: 2074 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 Hash5b5d0bb0e682522099a2b9dbfb0672ce8828446ea4c6a74c512df01851f6a1a0218b88ff37d7a077deee0a442d79092531e0bdc7c1f72c18d18e0540d1f6af1b
Related CVEs affecting Acquia
CVE-2024-47051 9.9 This advisory addresses two critical security vulnerabilities present in Maut... CVE-2020-35124 9.6 A cross-site scripting (XSS) vulnerability in the assets component of Mautic ... 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...
View all Acquia CVEs →

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