What is CVE-2016-6798?

CVE-2016-6798 is a critical-severity vulnerability in Apache Sling, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2017-07-19.

How severe is CVE-2016-6798?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2016-6798 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XXE in Apache Sling

CVE-2016-6798

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…

Vulnerability class: XXE (XML External Entity)

EPSS: 0.013 (80.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Sling
Apache Software Foundation Sling — versions prior to 1.0.12

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

Public proof-of-concept exploits

References

security@apache.org (x_refsource_MISC)
security@apache.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2016-6798?: CVE-2016-6798 is a critical-severity vulnerability in Apache Sling, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2017-07-19.
How severe is CVE-2016-6798?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-6798 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.