PatchTheCVECVE-2020-35129: Mautic before 3.2.4 is affected by stored XSS
CVE-2020-35129 is a critical-severity flaw (CVSS 9.0) affecting mautic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Mautic before 3.2.4 is affected by stored XSS. An attacker with access to Social Monitoring, an application feature, could attack other users, including administrators. For example, an attacker could load an externally drafted JavaScript file that would allow them to eventually perform actions on the target user’s behalf, including changing the user’s password or email address or changing the attacker’s user role from a low-privileged user to an
Why this priority
- Critical severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.0 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 1.0% (top 37%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-01-19 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-35129?
mautic: upgrade to 3.2.4. Exact commands for each OS are on this page.
Is CVE-2020-35129 being exploited?
CVE-2020-35129 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-35129 affect?
CVE-2020-35129 affects mautic. Severity is critical (CVSS 9.0). Mautic before 3.2.4 is affected by stored XSS. An attacker with access to Social Monitoring, an application feature, could attack other users, including administrators. For example, an attacker could load an externally drafted JavaScript fi
How urgent is CVE-2020-35129?
Priority 47/100. Critical severity
Related CVEs
- CVE-2026-3105 HIGH 7.6 UPGRADE SummaryThis advisory addresses a SQL injection vulnerability in the API endpoint used for retrieving contact a
- CVE-2024-47059 MEDIUM 4.3 DOWNGRADE When logging in with the correct username and incorrect weak password, the user receives the notification, tha
- CVE-2024-47058 LOW 2.9 UPGRADE With access to edit a Mautic form, the attacker can add Cross-Site Scripting stored in the html filed
- CVE-2024-47055 MEDIUM 4.3 UPGRADE SummaryThis advisory addresses a security vulnerability in Mautic related to the segment cloning functionality
- CVE-2024-47053 HIGH 7.7 UPGRADE This advisory addresses an authorization vulnerability in Mautic's HTTP Basic Authentication implementation