CVE-2016-6798

highpriority · attend · 50EPSS 0.037 · 90 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

3.67% (90th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.09.3criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-611USprimaryCWE-611US

exploits (1)

Public proof-of-concept and weaponised exploit code.

tafamace/CVE-2016-6798tafamace/CVE-2016-6798PoC · poc_in_github

affected products (4)

Products and version ranges known to be affected.

Apache Software Foundation Apache Sling≤ prior to 1.0.12enisa_euvdEU
apache sling≤ 1.0.10nvdUScpe:2.3:a:apache:sling:*:*:*:*:*:*:*:*
Maven org.apache.sling:org.apache.sling.xss< 1.0.12osvUSpkg:maven/org.apache.sling/org.apache.sling.xss
Maven org.apache.sling:org.apache.sling.xss.compat< 1.1.0osvUSpkg:maven/org.apache.sling/org.apache.sling.xss.compat

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-7g54-vgp6-jj5wXML External Entity Reference in Apache Sling2022-05-17ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2017-07-19modified 2026-06-17

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+1516 more

references (5)

External citations — patches, advisories, analysis.

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