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
Published Jul 19, 2017
9.8
CRITICALCVSS 3.0
EPSS 3.67%
Description
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 products
-
- Version prior to 1.0.12StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Sling | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.67% (0.03669) | 89.29th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.67% (0.03669) | 88.18th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.34% (0.01343) | 78.22th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.67% (0.07669) | 86.21th | v4 (v2025.03.14) |
| Mar 28, 2025 | 1.34% (0.01343) | 78.23th | v4 (v2025.03.14) |
| Mar 27, 2025 | 7.67% (0.07669) | 90.68th | v4 (v2025.03.14) |
| Mar 20, 2025 | 5.08% (0.05082) | 88.91th | v4 (v2025.03.14) |
| Mar 19, 2025 | 7.67% (0.07669) | 90.81th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.08% (0.05082) | 89.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00096) | 41.97th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.10% (0.00096) | 40.70th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00096) | 38.68th | v3 (v2023.03.01) |
| Mar 6, 2023 | 9.03% (0.09029) | 94.14th | v2 (v2022.01.01) |
| Apr 1, 2022 | 9.03% (0.09029) | 93.60th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
References (7)
- http://www.securityfocus.com/bid/99873 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://github.com/advisories/GHSA-7g54-vgp6-jj5w Advisory
- https://github.com/apache/sling-org-apache-sling-xss/commit/de32b144ad2be3367559f6184d560db42a220529
- https://github.com/jensdietrich/xshady-release/tree/main/CVE-2016-6798
- https://lists.apache.org/thread.html/b72c3a511592ec70729b3ec2d29302b6ce87bbeab62d4745617a6bd0%40%3Cdev.sling.apache.org%3E x_refsource_MISC
- https://lists.apache.org/thread.html/b72c3a511592ec70729b3ec2d29302b6ce87bbeab62d4745617a6bd0@%3Cdev.sling.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2016-6798
Change history (0)
No recorded changes yet.