CVE-2021-27914

MEDIUM

A cross-site scripting (XSS) vulnerability in the installer component of Mautic before 4.3.0 allows admins to inject executable javascript

Affects 1 product across 1 vendor.

CVSS 3.14.8
EPSS0.5%
Percentile39th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, high privileges required, requires user interaction, can impact systems beyond the vulnerable component, no 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 installer component of Mautic before 4.3.0 allows attackers to inject executable JavaScript, potentially leading to unauthorized actions or data theft.

BSID: BS-2022-GLOBAL-068301-M • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-2021-27914?
A cross-site scripting (XSS) vulnerability in the installer component of Mautic before 4.3.0 allows attackers to inject executable JavaScript, potentially leading to unauthorized actions or data theft.
What is the CVSS score for CVE-2021-27914?
CVE-2021-27914 has CVSS 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS: 0.5%.
Is CVE-2021-27914 actively exploited?
No confirmed active exploitation of CVE-2021-27914 as of 2026-05-30.
How do I remediate CVE-2021-27914?
Priority: MEDIUM.
What systems are affected by CVE-2021-27914?
CVE-2021-27914 affects Acquia Mautic.
Vulnerability Details
CVE IDCVE-2021-27914
BSIDBS-2022-GLOBAL-068301-M BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Published2022-06-01
Last Modified2024-11-21
ICS Relevance0%
Weakness (CWE)
Cross-Site Scripting (XSS)
SourceNVD
Official Description

A cross-site scripting (XSS) vulnerability in the installer component of Mautic before 4.3.0 allows admins to inject executable javascript

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability exists in the installer component of Mautic versions prior to 4.3.0. An attacker can exploit this by injecting malicious JavaScript code during the installation process, which can then be executed in the context of the admin's browser.

Exploitation Likelihood: MEDIUM

Affected Products
VendorProductAffected Versions
Acquia Mautic < 4.3.0
Remediation

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

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 1597 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
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashd0780e5cea8fb2eb16d4aa95a8ca0681b843982e61b157468ec76cbb318b068bd83d65b764752d53ebfb7561261bba7ddbd352692b2331770482de57605b525e
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-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-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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