CVE-2025-13984VulnerabilityPublished 28 Jan 2026

CVE-2025-13984: Drupal Next.js · Permissive Cross-domain Security Policy with Untrusted Domains

Affects Drupal Next.jsSource CVE Database V5

Not known to be exploited · CVSS 6.1 Medium : upgrade to 2.0.1 or 1.6.4 when convenient.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

6.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.0.1, 1.6.4

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Drupal Next.js to 2.0.1 or 1.6.4.

Affected software

Product	Affected	Fixed in
DrupalNext.js	Affected <1.6.4 >=2.0.0 <2.0.1	Fixed in 2.0.1 1.6.4
npmnext`pkg:npm/next`Other threats	Affected =0.0.0 =2.0.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

European organizations should immediately identify any Drupal installations using affected Next.js versions (prior to 1.6.4 and 2.0.1). The primary mitigation is to upgrade Next.js to version 1.6.4 or later, or 2.0.1 or later, where the vulnerability is resolved. If immediate upgrading is not feasible, organizations should review and tighten cross-domain security policies, including Content Security Policy (CSP) headers, to restrict allowed domains explicitly and avoid wildcard or overly permissive settings. Implementing strict input validation and output encoding can reduce the risk of XSS exploitation. Additionally, employing web application firewalls (WAFs) with rules targeting XSS patterns can provide temporary protection. Regular security audits and penetration testing focusing on cross-domain policies and XSS vectors are recommended. User awareness training to recognize phishing and suspicious links can help mitigate user interaction risks. Monitoring for unusual script execution or anomalous web traffic may help detect exploitation attempts early.

Description

CVE-2025-13984 is a medium severity vulnerability in Drupal's Next.js integration involving a permissive cross-domain security policy that allows untrusted domains. This misconfiguration enables Cross-Site Scripting (XSS) attacks by permitting malicious domains to execute scripts in the context of trusted sites. The vulnerability affects Next.js versions from 0.0.0 before 1.6.4 and from 2.0.

Impact

For European organizations, this vulnerability poses a risk primarily to web applications built using Drupal integrated with affected versions of Next.js. Successful exploitation can lead to unauthorized script execution, potentially compromising user session tokens, personal data, or enabling phishing attacks through manipulated content. This can result in confidentiality breaches and integrity violations, undermining user trust and potentially violating GDPR requirements for data protection. While availability is not directly impacted, the reputational damage and regulatory consequences could be significant. Organizations in sectors with high web presence such as e-commerce, government portals, and financial services are particularly at risk. The vulnerability's exploitation does not require authentication, increasing the attack surface. Given the widespread use of Drupal and Next.js in Europe, especially in countries with strong digital economies, the impact could be broad if unpatched systems remain in production.

CWE-942Permissive Cross-domain Security Policy with Untrusted Domains (opens in a new tab)
Variant weaknessOWASP Top 10 A02:2025: Security Misconfiguration (opens in a new tab)
The product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.
Architecture and Design · Operation · Attack Surface Reduction
Define a restrictive Content Security Policy or cross-domain policy file.
Architecture and Design · Operation · Attack Surface Reduction
Avoid using wildcards in the CSP / cross-domain policy file. Any domain matching the wildcard expression will be implicitly trusted, and can perform two-way interaction with the target server.
Architecture and Design · Operation · Environment Hardening
For Flash, modify crossdomain.xml to use meta-policy options such as 'master-only' or 'none' to reduce the possibility of an attacker planting extraneous cross-domain policy files on a server.
OWASP ASVS 4.0.3
V8.3.8 (opens in a new tab)
V1.14.1 (opens in a new tab)
V13.4.2 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

drupal.org/sa-contrib-2025-122 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Feb 2026, 08:51 UTC

WeaknessesCWE-942

Technical details

References

Community reviews

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