CVE-2025-35939
Craft CMS External Control of Assumed-Immutable We - [Actively Exploited]
Description
Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue.
INFO
Published Date :
May 7, 2025, 11:15 p.m.
Last Modified :
June 3, 2025, 8:59 p.m.
Source :
9119a7d8-5eab-497f-8521-727c672e3725
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Craft CMS contains an external control of assumed-immutable web parameter vulnerability. This vulnerability could allow an unauthenticated client to introduce arbitrary values, such as PHP code, to a known local file location on the server. This vulnerability could be chained with CVE-2024-58136 as represented by CVE-2025-32432.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
https://github.com/craftcms/cms/pull/17220 ; https://nvd.nist.gov/vuln/detail/CVE-2025-35939
Public PoC/Exploit Available at Github
CVE-2025-35939 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-35939.
| URL | Resource |
|---|---|
| https://github.com/craftcms/cms/pull/17220 | Patch |
| https://github.com/craftcms/cms/releases/tag/4.15.3 | Release Notes |
| https://github.com/craftcms/cms/releases/tag/5.7.5 | Release Notes |
| https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json | Third Party Advisory |
| https://www.cve.org/CVERecord?id=CVE-2025-35939 | VDB Entry |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Community reconstruction of the legacy JSON NVD Data Feeds. This project uses and redistributes data from the NVD API but is neither endorsed nor certified by the NVD.
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-35939 vulnerability anywhere in the article.
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BleepingComputer
CISA warns of ConnectWise ScreenConnect bug exploited in attacks
CISA is alerting federal agencies in the U.S. of hackers exploiting a recently patched ScreenConnect vulnerability that could lead to executing remote code on the server. The agency is warning that fo ... Read more
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TheCyberThrone
CISA Adds Five New Vulnerabilities to KEV Catalog
The Cybersecurity and Infrastructure Security Agency (CISA) has expanded its Known Exploited Vulnerabilities (KEV) Catalog, adding five new vulnerabilities that pose a high risk to federal agencies an ... Read more
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security.nl
VS meldt actief misbruik van kwetsbaarheden in Craft CMS
Aanvallers maken actief misbruik van twee kwetsbaarheden in Craft CMS, een contentmanagementsysteem voor het opzetten van websites, vergelijkbaar met WordPress. Dat meldt het Cybersecurity and Infrast ... Read more
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Daily CyberSecurity
CISA Adds 5 Actively Exploited Vulnerabilities to KEV Catalog: ASUS Routers, Craft CMS, and ConnectWise Targeted
The Cybersecurity and Infrastructure Security Agency (CISA) has added five new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, citing verified evidence of active exploitation in ... Read more
The following table lists the changes that have been made to the
CVE-2025-35939 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jun. 03, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions up to (excluding) 4.15.3 *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions from (including) 5.0.0 up to (excluding) 5.7.5 Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://github.com/craftcms/cms/pull/17220 Types: Patch Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://github.com/craftcms/cms/releases/tag/4.15.3 Types: Release Notes Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://github.com/craftcms/cms/releases/tag/5.7.5 Types: Release Notes Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json Types: Third Party Advisory Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://www.cve.org/CVERecord?id=CVE-2025-35939 Types: VDB Entry -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Jun. 03, 2025
Action Type Old Value New Value Added Date Added 2025-06-02 Added Due Date 2025-06-23 Added Required Action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Added Vulnerability Name Craft CMS External Control of Assumed-Immutable Web Parameter Vulnerability -
CVE Modified by 9119a7d8-5eab-497f-8521-727c672e3725
May. 28, 2025
Action Type Old Value New Value Changed Description Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at `/var/lib/php/sessions`. Such session files are named `sess_[session_value]`, where `[session_value]` is provided to the client in a `Set-Cookie` response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue. Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at '/var/lib/php/sessions'. Such session files are named 'sess_[session_value]', where '[session_value]' is provided to the client in a 'Set-Cookie' response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue. Added Reference https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-147-01.json Added Reference https://www.cve.org/CVERecord?id=CVE-2025-35939 -
New CVE Received by 9119a7d8-5eab-497f-8521-727c672e3725
May. 07, 2025
Action Type Old Value New Value Added Description Craft CMS stores arbitrary content provided by unauthenticated users in session files. This content could be accessed and executed, possibly using an independent vulnerability. Craft CMS redirects requests that require authentication to the login page and generates a session file on the server at `/var/lib/php/sessions`. Such session files are named `sess_[session_value]`, where `[session_value]` is provided to the client in a `Set-Cookie` response header. Craft CMS stores the return URL requested by the client without sanitizing parameters. Consequently, an unauthenticated client can introduce arbitrary values, such as PHP code, to a known local file location on the server. Craft CMS versions 5.7.5 and 4.15.3 have been released to address this issue. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-472 Added Reference https://github.com/craftcms/cms/pull/17220 Added Reference https://github.com/craftcms/cms/releases/tag/4.15.3 Added Reference https://github.com/craftcms/cms/releases/tag/5.7.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-35939 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-35939
weaknesses.