CVE-2017-16807

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Published 2017-11-13 · Modified 2023-11-08

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CVSS v3

5.4

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

6.4

Description

Kirby XSS Vulnerability

Predictions

Exploit likelihood

64%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-43140 webapps php verified text · 1 KB

Ishaq Mohammed · 2017-11-13

Kirby CMS < 2.5.7 - Cross-Site Scripting

text exploit Source: Exploit-DB

# Exploit Title: KirbyCMS <2.5.7 Stored Cross Site Scripting
# Vendor Homepage: https://getkirby.com/
# Software Link: https://getkirby.com/try
# Discovered by: Ishaq Mohammed
# Contact: https://twitter.com/security_prince
# Website: https://about.me/security-prince
# Category: webapps
# Platform: PHP
# CVE: CVE-2017-16807

1. Description
   
A cross-site Scripting (XSS) vulnerability in Kirby Panel before 2.3.3, 2.4.x before 2.4.2, and 2.5.x before 2.5.7 exists when displaying a specially prepared SVG document that has been uploaded as a content file.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16807

2. Proof of Concept

Steps to Reproduce:
Log in as an Editor and click on Site Options
Add the malicious .svg file which contains the javascript to the Site
Login to another browser with Admin Credentials.
Click on Site Options.
Click on the newly added .svg file

3. Reference

https://securityprince.blogspot.in/2017/11/cve-2017-16807-kirby-cms-257-cross-site.html   
https://getkirby.com/changelog/kirby-2-5-7

4. Solution

The vulnerability is patched by the vendor in the version 2.5.7.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Packagist	getkirby/cms	`<2.3.3`	`2.3.3`
Packagist	getkirby/cms	`>=2.4,<2.4.2`	`2.4.2`
Packagist	getkirby/cms	`>=2.5,<2.5.7`	`2.5.7`

Application impact

Vendor	Product	Versions	Fixed
getkirby	panel	`{"endExcluding":"2.3.3"}`	`2.3.3`

References

CWEs

CWE-79

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.