CVE-2025-14556Public exploitNetwork attack vector

Stored XSS via unvalidated toggle-link responses

Published Jan 14, 2026 · Updated Jan 14, 2026

Cross-site scripting in Drupal Flag 7.x-3.0 through 7.x-3.9 allows remote authenticated users to execute JavaScript in a victim's browser. The JavaScript toggle handler follows attacker-supplied flag links without validating local targets, while the PHP path does not prove that responses came from Flag. Exploitation requires permission to create links in filtered site content and a victim to activate the crafted link.

CVSS severity4.8
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Drupal Flag 7.x-3.0 through 7.x-3.9 allows remote authenticated users to execute JavaScript in a victim's browser. The JavaScript toggle handler follows attacker-supplied flag links without validating local targets, while the PHP path does not prove that responses came from Flag. Exploitation requires permission to create links in filtered site content and a victim to activate the crafted link.

The record

CVE
CVE-2025-14556
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
Avatar Uploader Project
Product
Flag
Classifications
CWE-79, CAPEC-63, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.x-3.0 <=7.x-3.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Avatar Uploader Project · Flagversion=7.x-3.0 <=7.x-3.9

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.8Drupal.orgCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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