Is CVE-2015-4557 in the CISA KEV catalog?

No. CVE-2015-4557 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-4557?

CVE-2015-4557 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2015-4557?

CVE-2015-4557 has an EPSS score of 1.96% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4557?

Upgrade nextend twitter connect to 1.5.2 or later.

CVE & CISA-KEV Catalog

CVE-2015-4557

MEDIUMEPSS 78th pctl

6.1

CVSS v3

NVD

Description

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

nextend twitter connectNVD

Affected:< 1.5.2Fixed in:1.5.2CVE-2015-4557derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

1.96%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Exploit2

Third-Party Advisory2

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.