CVE-2026-23734
XWiki Platform: Path traversal via resources parameter in ssx and jsx endpoints when using leading slash
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
XWiki Platform: Path traversal via resources parameter in ssx and jsx endpoints when using leading slash
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
- Record
CVE-2026-23734- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-23
- Updated
- 2026-11-02
EUVDEUVD-2026-31152
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
- Record
EUVD-2026-31152- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xq3r-2qv5-vqqm
XWiki Platform has path traversal via resources parameter in ssx and jsx endpoints when using leading slash
Impact
It's possible to get access and read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false.
This can apparently be reproduced on Tomcat instances.
Patches
This has been patched in 18.0.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
Workarounds
There is no known workaround, other than upgrading XWiki.
References
- https://jira.xwiki.org/browse/XCOMMONS-3547
- https://github.com/xwiki/xwiki-commons/commit/a979cafd89f6a9c9c0b9ab19744d672df64429bf
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki.org
- Email us at Security Mailing List
Attribution
The vulnerability was reported by Michał Kołek.
- Record
GHSA-xq3r-2qv5-vqqm- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-23
- Updated
- 2026-11-02
NVD
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
- Record
CVE-2026-23734- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-23
- Updated
- 2026-11-02
OSV
XWiki Platform: Path traversal via resources parameter in ssx and jsx endpoints when using leading slash
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
- Record
CVE-2026-23734- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-23
- Updated
- 2026-11-02
OSVGHSA-xq3r-2qv5-vqqm
XWiki Platform has path traversal via resources parameter in ssx and jsx endpoints when using leading slash
Impact
It's possible to get access and read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false.
This can apparently be reproduced on Tomcat instances.
Patches
This has been patched in 18.0.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
Workarounds
There is no known workaround, other than upgrading XWiki.
References
- https://jira.xwiki.org/browse/XCOMMONS-3547
- https://github.com/xwiki/xwiki-commons/commit/a979cafd89f6a9c9c0b9ab19744d672df64429bf
For more information
If you have any questions or comments about this advisory:
- Open an issue in Jira XWiki.org
- Email us at Security Mailing List
Attribution
The vulnerability was reported by Michał Kołek.
- Record
GHSA-xq3r-2qv5-vqqm- CVSS 4.0
- 9.3 Critical
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-23
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
4.2-milestone-2 up to 16.10.17 | 16.10.17 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
17.0.0-rc-1 up to 17.4.9 | 17.4.9 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
17.5.0 up to 17.10.3 | 17.10.3 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
18.0.0-rc-1 up to 18.1.0-rc-1 | 18.1.0-rc-1 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
4.2-milestone-2 up to 16.10.17, plus listed versions 10.010.110.1-rc-110.1010.10-rc-1 Show 45 moreShow less10.1110.11-rc-110.11.110.11.1010.11.1110.11.210.11.310.11.410.11.510.11.610.11.710.11.810.11.910.210.310.410.4-rc-110.510.5-rc-110.610.6-rc-110.6.110.710.7-rc-110.7.110.810.8-rc-110.8.110.8.210.8.310.911.011.0.111.0.211.0.311.111.1-rc-111.1011.10.111.10.1011.10.1111.10.1211.10.1311.10.211.10.3 |
16.10.17 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
17.0.0-rc-1 up to 17.4.9, plus listed versions 17.0.017.1.017.1.0-rc-117.2.017.2.0-rc-1 Show 14 moreShow less17.2.117.2.217.3.017.3.0-rc-117.4.017.4.0-rc-117.4.117.4.217.4.317.4.417.4.517.4.617.4.717.4.8 |
17.4.9 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
17.5.0 up to 17.10.3, plus listed versions 17.10.017.10.0-rc-117.10.117.10.217.6.0 Show 7 moreShow less17.6.0-rc-117.7.017.7.0-rc-117.8.017.8.0-rc-117.9.017.9.0-rc-1 |
17.10.3 |
org.xwiki.commons:xwiki-commons-classloader-apiMaven |
18.0.0-rc-1 up to 18.1.0-rc-1, plus listed versions 18.0.018.0.1 |
18.1.0-rc-1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-23734 is a critical vulnerability (CVSS 9.3) in Xwiki Xwiki-commons, published May 20, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 18.5%, the 97th percentile. Fixed in org.xwiki.commons:xwiki-commons-classloader-api 16.10.17.
References
github.com/xwiki/xwiki-commons/security/advisories/GHSA-xq3r-2qv5-vqqm
jira.xwiki.org/browse/XCOMMONS-3547
nvd.nist.gov/vuln/detail/CVE-2026-23734
Left out here: 433 versions. The JSON record has them.