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Fencer Intel
medium 6.1

CVE-2015-4557 json

Cross-site scripting (XSS) vulnerability in the new_Twitter_sign_button function in nextend-Twitter-connect.php in the Nextend Twitter Conn…

published 2018-04-12 8 y ago modified 2026-06-17 4 mo ago also EUVD-2015-4577

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

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.

Patch / fix

  • nextendweb nextend_twitter_connect 1.5.2

Exploit prediction

1.88% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • seclists.org http://seclists.org/fulldisclosure/2015/Jun/71 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/132432/WordPress-Nextend-Twitter-Connect-1.5.1-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.