CVE-2026-9559: Mautic vulnerable to Path Traversal via Campaign Import

Should you act?

Critical, preconditions apply

Severe if exploited, but exploitation needs conditions that may not apply to you. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
• EPSS 0.9%, percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
• Needs an account (low (any account)). Exposure depends on who can log in.
• Only applies if your dependency tree includes mautic/core (Composer (PHP)) >= 7.0.0, < 7.1.2, fixed in 7.1.2. Check your lockfile, including transitive dependencies.

What it is

A path traversal vulnerability exists in the campaign import feature of Mautic 7. When extracting uploaded ZIP files during campaign imports, a flaw in the validation logic allows file paths to escape the intended temporary directories. An authenticated user with campaign import privileges (campaign:imports:create) can write arbitrary PHP files to sensitive system directories. An attacker can exploit this to overwrite critical internal configuration or cache components, resulting in Remote Code Execution (RCE) under the context of the web server user.

From the GitHub advisory

Summary A path traversal vulnerability exists in the campaign import feature of Mautic 7. When extracting uploaded ZIP files during campaign imports, a flaw in the validation logic allows file paths to escape the intended temporary directories.

Impact An authenticated user with campaign import privileges (campaign:imports:create) can write arbitrary PHP files to sensitive system directories. An attacker can exploit this to overwrite critical internal configuration or cache components, resulting in Remote Code Execution (RCE) under the context of the web server user.

Patched Versions This security issue has been addressed in the following release: 7.1.2

Note: Mautic 6.x, 5.x, and 4.x branches are not affected by this vulnerability. For general security support regarding legacy Mautic 4 releases, please refer to the ELTS page.

Workarounds There are no official workarounds. To mitigate this risk without upgrading, revoke campaign import permissions (campaign:imports:create) from non-administrative users.

Weakness type: CWE-22, CWE-73, CWE-98.

Product: mautic/core (Composer (PHP)) · Assigned by: Mautic · Published: 2026-05-29

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: low (any account)
• User interaction: none
• Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation none, automatable no, technical impact total.
• FIRST EPSS (model of 2026-10-21): 0.93% probability of exploitation activity in the next 30 days; percentile 60.

Timeline

• 2026-05-29 — CVE record last updated
• 2026-05-29 — CVE record published by Mautic
• 2026-07-02 — GitHub-reviewed advisory GHSA-6r9h-4h75-7q4x published (critical)

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-6r9h-4h75-7q4x github.com
2. CVE.org record CVE-2026-9559 cve.org
3. NVD entry CVE-2026-9559 nvd.nist.gov

Other references from the CVE record and advisory

1. github.com github.com

Critical Composer (PHP) advisories · Today’s Security Digest