THREATPORT/VULNERABILITY/CVE-2016-6798
CRITICAL SEVERITY

CVE-2016-6798

Sling vulnerability

CVSS
9.8
EPSS
3.7%
EPSS pct
88th
Exploited
No known
In the XSS Protection API module before 1.0.12 in Apache Sling, the method XSS.getValidXML() uses an insecure SAX parser to validate the input string, which allows for XXE attacks in all scripts which use this method to validate user input, potentially allowing an attacker to read sensitive data on the filesystem, perform same-site-request-forgery (SSRF), port-scanning behind the firewall or DoS the application.
Affected vendor
Apache
Affected product
Sling
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-611 — XML External Entity (XXE) Reference
Published
2017-07-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2016-6798

  • Confirm whether Apache Sling is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-6798.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-6798

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-6798 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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