CVE-2015-0258Public exploitNetwork attack vector

Authenticated code execution via avatar extension bypass

Published Feb 17, 2020 · Updated Aug 6, 2024

Unrestricted file upload in Collabtive before 2.1 allows remote authenticated users to execute arbitrary code through a crafted avatar. The manageuser.php avatar handler rejects only listed extensions, so PHP-executable .php3, .php4, .php5, and .phtml files pass validation. A valid account and a server configured to execute the uploaded extension are required; successful exploitation runs attacker-supplied code in the web application's context.

CVSS severity8.8
High
EPSS probability3.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unrestricted file upload in Collabtive before 2.1 allows remote authenticated users to execute arbitrary code through a crafted avatar. The manageuser.php avatar handler rejects only listed extensions, so PHP-executable .php3, .php4, .php5, and .phtml files pass validation. A valid account and a server configured to execute the uploaded extension are required; successful exploitation runs attacker-supplied code in the web application's context.

The record

CVE
CVE-2015-0258
Published
Feb 17, 2020
Updated
Aug 6, 2024
Vendor
o-dyn
Product
Collabtive
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 17, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

o-dyn · Collabtiveversion=before 2.1

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo