Drupal up to 7.26 Form State API information disclosure

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3.2	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Drupal. This affects an unknown function of the component Form State API. This manipulation causes information disclosure. This vulnerability is handled as CVE-2014-2983. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Drupal (Content Management System). It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component Form State API. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Drupal 6.x before 6.31 and 7.x before 7.27 does not properly isolate the cached data of different anonymous users, which allows remote anonymous users to obtain sensitive interim form input information in opportunistic situations via unspecified vectors.

The advisory summarizes:

Drupal's form API has built-in support for temporary storage of form state, for example user input. This is often used on multi-step forms, and is required on Ajax-enabled forms in order to allow the Ajax calls to access and update interim user input on the server.

The weakness was released 04/16/2014 by Daniel F. Kudwien, Rodionov Igor, Ryan Szrama, Roman Zimmermann and znerol as SA-CORE-2014-002 as confirmed advisory (Website). The advisory is shared at drupal.org. This vulnerability is known as CVE-2014-2983 since 04/21/2014. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue. The advisory points out:

When pages are cached for anonymous users (either by Drupal or by an external system), form state may leak between anonymous users. As a consequence there is a chance that interim form input recorded for one anonymous user (which may include sensitive or private information, depending on the nature of the form) will be disclosed to other users interacting with the same form at the same time. This especially affects multi-step Ajax forms because the window of opportunity (i.e. the time span between user input and final form submission) is indeterminable.

The vulnerability scanner Nessus provides a plugin with the ID 73635 (Drupal 7.x < 7.27 Forms API Information Disclosure), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses. The commercial vulnerability scanner Qualys is able to test this issue with plugin 12932 (Drupal Core Form API Information Disclosure Vulnerability (SA-CORE-2014-002)).

Upgrading to version 6.31 or 7.27 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (92675), Tenable (73635), SecurityFocus (BID 66977†), Secunia (SA58132†) and Vulnerability Center (SBV-44341†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Content Management System

Name

• Drupal

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.10
• 6.11
• 6.12
• 6.13
• 6.14
• 6.15
• 6.16
• 6.17
• 6.18
• 6.19
• 6.20
• 6.21
• 6.22
• 6.23
• 6.24
• 6.25
• 6.26
• 6.27
• 6.28
• 6.29
• 6.30
• 7.0
• 7.1
• 7.2
• 7.10
• 7.11
• 7.12
• 7.13
• 7.14
• 7.15
• 7.16
• 7.17
• 7.18
• 7.19
• 7.20
• 7.21
• 7.22
• 7.23
• 7.24
• 7.25
• 7.26

License

• open-source

Website

• Product: https://www.drupal.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.7
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 73635
Nessus Name: Drupal 7.x < 7.27 Forms API Information Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 702913
OpenVAS Name: Debian Security Advisory DSA 2913-1 (drupal7 - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Drupal 6.31/7.27

Timelineinfo

04/16/2014 🔍
04/16/2014 +0 days 🔍
04/16/2014 +0 days 🔍
04/16/2014 +0 days 🔍
04/21/2014 +5 days 🔍
04/21/2014 +0 days 🔍
04/21/2014 +0 days 🔍
04/22/2014 +1 days 🔍
04/23/2014 +1 days 🔍
04/30/2014 +7 days 🔍
05/11/2026 +4394 days 🔍

Sourcesinfo

Product: drupal.org

Advisory: SA-CORE-2014-002
Researcher: Daniel F. Kudwien, Rodionov Igor, Ryan Szrama, Roman Zimmermann, znerol
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-2983 (🔍)
GCVE (CVE): GCVE-0-2014-2983
GCVE (VulDB): GCVE-100-13021

OVAL: 🔍

X-Force: 92675 - Drupal form API information disclosure, Medium Risk
SecurityFocus: 66977 - Drupal Core Information Disclosure Vulnerability
Secunia: 58132 - Drupal Form State Information Disclosure Security Issue, Less Critical
Vulnerability Center: 44341 - Drupal 6.x before 6.31 and 7.x before 7.27 Remote Information Disclosure due to an Error in Form API, Medium

Entryinfo

Created: 04/22/2014 14:18
Updated: 05/11/2026 22:01
Changes: 04/22/2014 14:18 (80), 05/27/2017 10:25 (5), 06/17/2021 14:12 (3), 12/17/2024 10:45 (16), 05/11/2026 22:01 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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