CVE-2025-2889Network attack vector

Stored XSS via unescaped link additional parameters

Published Apr 4, 2025 · Updated Apr 8, 2026

Stored XSS in Yannick Lefebvre Link Library 7.7.3 and earlier allows remote authenticated users to inject scripts through link parameters. In link-library-admin.php, the Link Additional Parameters value is stored without sufficient sanitization and later rendered without output escaping. Contributor-level access is required, and the injected JavaScript executes whenever a user opens an affected page, enabling actions in that user's browser context.

CVSS severity6.4
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Yannick Lefebvre Link Library 7.7.3 and earlier allows remote authenticated users to inject scripts through link parameters. In link-library-admin.php, the Link Additional Parameters value is stored without sufficient sanitization and later rendered without output escaping. Contributor-level access is required, and the injected JavaScript executes whenever a user opens an affected page, enabling actions in that user's browser context.

The record

CVE
CVE-2025-2889
Published
Apr 4, 2025
Updated
Apr 8, 2026
Vendor
Community Events Project
Product
Link Library
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=7.7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Community Events Project · Link Libraryversion=0 <=7.7.3

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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