CVE-2021-27915

CRITICAL

Prior to the patched version, there is an XSS vulnerability in the description fields within the Mautic application which could be exploited by a logged in user of Mautic with the appropriate permi...

Affects 1 product across 1 vendor.

CVSS 3.19.0
EPSS0.6%
Percentile49th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, low privileges 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.

CWE-80: CWE-80
Related Attack Patterns (CAPEC)
CAPEC-18 XSS Targeting Non-Script Elements
via CWE-80
CAPEC-32 XSS Through HTTP Query Strings
via CWE-80
CAPEC-85 AJAX Footprinting
via CWE-79
CAPEC-86 XSS Through HTTP Headers
via CWE-80
CAPEC-193 PHP Remote File Inclusion
via CWE-80
Show all 10
via CWE-79
via CWE-79
via CWE-79
via CWE-79
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 exists in the description fields of the Mautic application, allowing a logged-in user with appropriate permissions to potentially elevate their access to the system.

BSID: BS-2024-GLOBAL-268635-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

Is this CVE in your environment?

BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.

Check My Environment →
Frequently Asked Questions
What is CVE-2021-27915?
A Cross-Site Scripting (XSS) vulnerability exists in the description fields of the Mautic application, allowing a logged-in user with appropriate permissions to potentially elevate their access to the system.
What is the CVSS score for CVE-2021-27915?
CVE-2021-27915 has CVSS 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H. EPSS: 0.6%.
Is CVE-2021-27915 actively exploited?
No confirmed active exploitation of CVE-2021-27915 as of 2026-05-30.
How do I remediate CVE-2021-27915?
Priority: IMMEDIATE. PSIRT: [email protected]
What systems are affected by CVE-2021-27915?
CVE-2021-27915 affects Acquia Mautic.
Vulnerability Details
CVE IDCVE-2021-27915
BSIDBS-2024-GLOBAL-268635-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Published2024-09-17
Last Modified2024-09-29
ICS Relevance0%
Weakness (CWE)
Cross-Site Scripting (XSS)CWE-80
SourceNVD
Official Description

Prior to the patched version, there is an XSS vulnerability in the description fields within the Mautic application which could be exploited by a logged in user of Mautic with the appropriate permissions. This could lead to the user having elevated access to the system.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

An attacker with the necessary permissions can inject malicious scripts into the description fields of the Mautic application. These scripts can then be executed in the context of other users' browsers, potentially leading to unauthorized actions or data theft.

Exploitation Likelihood: HIGH

Affected Products
VendorProductAffected Versions
Acquia Mautic ≥ 1.0.0, < 4.4.12
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: 758 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 Hash0883e20f46f1900422ee39a42fb0097ef706b39966805252204b3efd90f07a3ba07dcadc24a330b96662d42f159771164c487ac968fa9c9cee3f94085a4e0bd4
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 →

Critical Severity - Know Your Exposure

A CVSS 9.0 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.

Create a free account →