VDB-128196 · CVE-2018-1000874 · Issue 166

PHP Markdown up to 1.2.0 Parser cross site scripting ⚔ [Disputed]

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in PHP Markdown up to 1.2.0. This affects an unknown part of the component Parser. The manipulation results in cross site scripting. This vulnerability is identified as CVE-2018-1000874. The attack can be executed remotely. There is not any exploit available. There is ongoing doubt regarding the real existence of this vulnerability.

Detailsinfo

A vulnerability classified as problematic has been found in PHP Markdown up to 1.2.0 (Programming Language Software). Affected is an unknown code block of the component Parser. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

PHP Markdown version 1.2.0 and earlier contains a Cross Site Scripting (XSS) vulnerability in The parser allows a malicious crafted script to be executed that can result in Steal user data with a crafted script. This attack appear to be exploitable via User must open a crafted MD formatted file.

The bug was discovered 12/05/2018. The weakness was released 12/20/2018 (Website). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2018-1000874 since 12/20/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Programming Language Software

Name

PHP Markdown

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CNA Base Score: 6.1
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/05/2018 🔍
12/20/2018 +15 days 🔍
12/20/2018 +0 days 🔍
12/20/2018 +0 days 🔍
12/21/2018 +1 days 🔍
08/05/2024 +2054 days 🔍

Sourcesinfo

Advisory: 166
Status: Not defined
Disputed: 🔍

CVE: CVE-2018-1000874 (🔍)
GCVE (CVE): GCVE-0-2018-1000874
GCVE (VulDB): GCVE-100-128196

Entryinfo

Created: 12/21/2018 10:54
Updated: 08/05/2024 21:45
Changes: 12/21/2018 10:54 (56), 04/22/2020 16:21 (1), 06/20/2023 10:18 (3), 08/05/2024 21:45 (28)
Complete: 🔍
Cache ID: 216::103