CVE-2015-4557

Cross-site scripting (XSS) vulnerability in the new_Twitter_sign_button function in nextend...

6.1 Medium

Cross-site scripting (XSS) vulnerability in the new_Twitter_sign_button function in nextend-Twitter-connect.php in the Nextend Twitter Connect plugin before 1.5.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the redirect_to parameter. NOTE: this may overlap CVE-2015-4413.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.88%Up 0.7 points since Feb 4, 2022

What each source reports

NVD Score used 6.1

Record: CVE-2015-4557
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-4557
Updated: 2026-11-02

EUVDEUVD-2015-4577 No score

Record: EUVD-2015-4577
Updated: 2026-11-03

GitHub AdvisoriesGHSA-9gcw-333h-8wh3 6.1

Cross-site scripting (XSS) vulnerability in the new_Twitter_sign_button function in nextend...

Record: GHSA-9gcw-333h-8wh3
CVSS 3.0: 6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

nextendweb nextend twitter connect

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-4557 is a medium vulnerability (CVSS 6.1) in Nextendweb Nextend Twitter Connect, published April 12, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.88%, the 79th percentile. No source names a fixed version.