Skip to main content

Composer CVE-2025-3510

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2025-05-02 security@wordfence.com
6.4
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 6.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.15%.

Exploit ScenarioDerived

A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 28, 2026

The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 5.4 due to insufficient input sanitization and. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Affected products include: Tagdiv Composer.

Know when Composer gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 6.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

DescriptionCVE.org

The tagDiv Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple shortcodes in all versions up to, and including, 5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Executive ViewAI

Why It Matters

Organizations using tagDiv Composer should be aware of moderate risk from CVE-2025-3510, a cross-site scripting vulnerability rated CVSS 6.4. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.

Threat Intelligence Overview

EPSS Score
0.2%
Top 64% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)CVE.org

cpe:2.3:a:tagdiv:composer:*:*:*:*:*:wordpress:*:*
CVE-2021-29472 HIGH POC
8.8 Apr 27

Composer is a dependency manager for PHP. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, lo

CVE-2026-84361 HIGH POC
7.7 Sep 01

Command injection in PHP Composer's Perforce VCS handler allows arbitrary local command execution with the privileges of

CVE-2023-1596 MEDIUM POC
6.1 May 15

The tagDiv Composer WordPress plugin before 4.0 does not sanitise and escape a parameter before outputting it back in th

CVE-2021-41116 CRITICAL
9.8 Oct 05

Composer is an open source dependency manager for the PHP language. Rated critical severity (CVSS 9.8), this vulnerabili

CVE-2023-43655 HIGH
8.8 Sep 29

Composer is a dependency manager for PHP. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, lo

CVE-2022-24828 HIGH
8.8 Apr 13

Composer is a dependency manager for the PHP programming language. Rated high severity (CVSS 8.8), this vulnerability is

CVE-2026-10043 HIGH
7.8 Jun 24

Arbitrary code execution in MosaicML Composer arises when the library loads a model or resumption checkpoint, because ch

CVE-2026-59948 HIGH POC
7.0 Jul 08

Arbitrary file write in Composer (the PHP dependency manager) before 2.2.29 and 2.10.2 allows a malicious package served

CVE-2026-59946 MEDIUM
6.1 Jul 08

Path traversal in Composer's binary installation flow allows a malicious PHP package to cause arbitrary host files to be

CVE-2026-11914 MEDIUM
5.9 Jul 10

Improper input validation in the Drupal Composer contributed module (SA-contrib-2026-046) exposes sites to confidentiali

CVE-2026-109153 MEDIUM
5.3 Oct 13

Path traversal in MosaicML Composer 0.32.1 and earlier allows an attacker who supplies a crafted checkpoint archive to w

CVE-2026-59947 MEDIUM
4.7 Jul 08

Credential leakage in Composer PHP dependency manager exposes sensitive tokens - such as GitHub Personal Access Tokens e

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy