VulnerabilityPublished 9 Oct 2025

CVE-2025-62240: Liferay Portal · XSS or 'Cross-site Scripting'

Affects Liferay PortalSource CVE Database V5

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 11:42 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Active
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Active: Successful exploitation of this vulnerability requires a targeted user to perform specific, conscious interactions with the vulnerable system and the attacker’s payload, or the user’s interactions would actively subvert protection mechanisms which would lead to exploitation of the vulnerability.
Vulnerable system 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 Vulnerable System.
Vulnerable system 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 to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Oct 2025
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 26 Oct 2026.

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 or the CVSS exploit maturity 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

Affected software

Product	Affected	Fixed in
Liferay Portal	Affected =7.4.3.35	Fixed in–

AI-suggested

European organizations should immediately assess their Liferay Portal and DXP deployments to identify affected versions. Although no official patches are currently linked, organizations should monitor Liferay’s security advisories for updates and apply patches promptly once available. In the interim, implement strict input validation and output encoding on user-supplied data fields, particularly those related to user profiles and calendar events, to neutralize malicious scripts. Deploy web application firewalls (WAFs) with robust XSS detection and prevention rules tailored to Liferay’s traffic patterns. Educate users about the risks of interacting with suspicious links or inputs within the portal to reduce the likelihood of successful social engineering. Review and harden Content Security Policy (CSP) headers to restrict script execution sources. Conduct regular security audits and penetration tests focusing on XSS vectors within the portal. Additionally, consider disabling or restricting features that allow user input in vulnerable fields if feasible until patches are applied.

Description

CVE-2025-62240 is a medium severity cross-site scripting (XSS) vulnerability affecting multiple versions of Liferay Portal and Liferay DXP. The flaw allows remote attackers to inject arbitrary web scripts or HTML via crafted payloads in user input fields such as First Name, Middle Name, or Last Name, specifically related to Calendar events. Exploitation requires no authentication but does require user interaction to trigger the malicious script. The vulnerability impacts confidentiality and integrity by enabling script execution in the context of authenticated users, potentially leading to session hijacking or unauthorized actions. No known exploits are currently reported in the wild. European organizations using affected Liferay Portal versions should prioritize patching or apply mitigations to prevent exploitation. Countries with significant Liferay deployments and critical infrastructure relying on this platform are at higher risk. Mitigation includes input validation, output encoding, and deploying web application firewalls with XSS protections. The CVSS 4.0 score is 4.

Impact

For European organizations, this vulnerability poses a risk primarily to confidentiality and integrity of user sessions and data within Liferay Portal environments. Successful exploitation could allow attackers to execute arbitrary scripts in the context of authenticated users, potentially leading to session hijacking, credential theft, or unauthorized actions such as data manipulation or privilege escalation. This could disrupt business operations, lead to data breaches, and damage organizational reputation. Since Liferay Portal is commonly used by government agencies, educational institutions, and enterprises across Europe for intranet portals and collaboration platforms, the impact could be significant if exploited. The requirement for user interaction somewhat limits the attack scope but does not eliminate risk, especially in environments with high user traffic or where social engineering is feasible. The lack of known exploits in the wild provides a window for proactive mitigation. However, failure to address the vulnerability could expose organizations to targeted attacks, especially in sectors with sensitive or regulated data.

Summary

CVE-2025-62240 is a cross-site scripting (XSS) vulnerability classified under CWE-79 that affects multiple versions of Liferay Portal (7.4.3.35 through 7.4.3.111) and Liferay DXP (2023.Q3.1 through 2023.Q4.5, including various updates). The vulnerability arises from improper neutralization of user-supplied input during web page generation, specifically in the Calendar events feature. Attackers can craft malicious payloads injected into user profile fields such as First Name, Middle Name, or Last Name. When these fields are rendered in the application, the injected scripts execute in the context of the victim's browser session. This can lead to theft of session cookies, unauthorized actions performed on behalf of the user, or redirection to malicious sites. The vulnerability does not require authentication to inject the payload but does require user interaction to trigger the script execution. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), user interaction required (UI:A), and low impact on confidentiality and integrity (VC:L, VI:L) with no impact on availability. There are no known exploits in the wild at the time of publication, and no official patches have been linked yet. The flaw is significant because Liferay Portal is widely used in enterprise environments for content management and collaboration, making it a valuable target for attackers seeking to compromise user sessions or escalate privileges via XSS.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
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.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-62240 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Oct 2025, 05:24 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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