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HIGH severity

CVE-2017-6090 — phpcollab

HIGH

CVE-2017-6090 is a high-severity (CVSS 8.8) Unrestricted File Upload vulnerability. 6 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
6 known
Exploitation data as of Oct 27, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
96.4%probability of exploitation in next 30 days
Very High Risk0.00%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
84.1%89.1%94.2%99.2%86.9%96.4%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2017-6090 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 396,966 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Unrestricted file upload vulnerability in clients/editclient.php in PhpCollab 2.5.1 and earlier allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in logos_clients/.

Affected Products

1 product · 1 configurations
Application
phpcollabphpcollab
≤ 2.5.1
range
Exploits & PoCs
6

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-43519remotephp✓ Verified

phpCollab 2.5.1 - File Upload (Metasploit)

by Metasploit · Jan 11, 2018

Exploit-DB Source
EDB-42934webappsphp✓ Verified

phpCollab 2.5.1 - Arbitrary File Upload

by Sysdream · Oct 2, 2017

Exploit-DB Source

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2017-6090 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

How to detect CVE-2017-6090

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2017-6090 -u https://target
Template
PhpColl 2.5.1 Arbitrary File Upload
Severity
high
Impact
Successful exploitation of this vulnerability can result in unauthorized remote code execution on the affected system.
Remediation
Apply the latest patch or upgrade to a newer version of PhpColl to mitigate this vulnerability.

Template by ProjectDiscovery nuclei-templates (pikpikcu), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

Unrestricted file upload vulnerability in clients/editclient.php in PhpCollab 2.5.1 and earlier allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in logos_clients/.
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CVE-2017-6090: phpcollab RCE (High 8.8)