CVE-2015-2543

Exchange Server vulnerability

CVSS

4.3

EPSS

9.5%

EPSS pct

95th

Exploited

No known

Cross-site scripting (XSS) vulnerability in Outlook Web Access (OWA) in Microsoft Exchange Server 2013 Cumulative Update 8 and 9 allows remote attackers to inject arbitrary web script or HTML via a crafted e-mail message, aka "Exchange Spoofing Vulnerability."

Affected vendor

Microsoft

Affected product

Exchange Server

CVSS vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Weakness type (CWE)

CWE-79 — Cross-Site Scripting (XSS)

Published

2015-09-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to integrity.

Its EPSS score of 9.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2015-2543

Confirm whether Microsoft Exchange Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2015-2543.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-2543

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-2543 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2015-2543?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2015-2543.

Start free scan

No credit card. Agentless.

Related vulnerabilities

MEDIUM

CVE-2025-1616

An5506 01a Firmware vulnerability

MEDIUM

CVE-2025-21758

Linux Kernel vulnerability

MEDIUM

CVE-2025-26466

Openssh vulnerability