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CRITICAL severity

XWiki Platform's Mail.MailConfig can be edited by any user with edit rightsGHSA-g75c-cjr6-39mc

CRITICALFix: xwiki/xwiki-platform@8910b88

GHSA-g75c-cjr6-39mc is a critical-severity (CVSS 9.9) Improper Privilege Management vulnerability in org.xwiki.platform:xwiki-platform-mail-send-default. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.xwiki.platform:xwiki-platform-mail-send-default — see the affected versions and patch details below.

Also known asCVE-2023-34465
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
1 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA’s SSVC triage for GHSA-g75c-cjr6-39mc.

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk
0.34%0.68%1.02%1.35%0.8%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
☕org.xwiki.platform:xwiki-platform-mail-send-default☕org.xwiki.platform:xwiki-platform-mail-send-default☕org.xwiki.platform:xwiki-platform-mail-send-default

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Mail.MailConfig can be edited by any logged-in user by default. Consequently, they can:

  • change the mail obfuscation configuration
  • view and edit the mail sending configuration, including the smtp domain name and credentials.

Patches

The problem has been patched on XWiki 14.4.8, 15.1, and 14.10.6.

Workarounds

The rights of the Mail.MailConfig page can be manually updated so that only a set of trusted users can view, edit and delete it (e.g., the XWiki.XWikiAdminGroup group). On 14.4.8+, 15.1-rc-1+, or 14.10.5+, if at startup Mail.MailConfig does not have any rights defined, view, edit and delete rights are automatically granted to the XWiki.XWikiAdminGroup group. See the corresponding patch.

References

For more information

If you have any questions or comments about this advisory:

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.xwiki.platform:xwiki-platform-mail-send-default≥ 11.8-rc-1&&< 14.4.814.4.8org.xwiki.platform:xwiki-platform-mail-send-default:14.4.8
☕Mavenorg.xwiki.platform:xwiki-platform-mail-send-default≥ 14.5&&< 14.10.614.10.6org.xwiki.platform:xwiki-platform-mail-send-default:14.10.6
☕Mavenorg.xwiki.platform:xwiki-platform-mail-send-default≥ 15.0-rc-1&&< 15.115.1org.xwiki.platform:xwiki-platform-mail-send-default:15.1

Affected Products

1 product · 4 configurations
Application
xwikixwiki
≥ 14.10 && < 14.10.6
2 versions
11.815.0
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

XWiki Platform is a generic wiki platform. Starting in version 11.8-rc-1…

jira.xwiki.orgNVDJun 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-mail-send-default, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.xwiki.platform:xwiki-platform-mail-send-default to 14.4.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-g75c-cjr6-39mc is resolved across your whole dependency graph.

  3. Workarounds

    Close the privilege gap rather than the entry point: audit which accounts, roles and service identities can reach the affected operation, drop the component to the least privilege it actually needs, and review file and directory permissions created by earlier installs — a default left in place is what makes this reachable.

Frequently Asked Questions

### Impact `Mail.MailConfig` can be edited by any logged-in user by default. Consequently, they can: - change the mail obfuscation configuration - view and edit the mail sending configuration, including the smtp domain name and credentials. ### Patches The problem has been patched on XWiki 14.4.8, 15.1, and 14.10.6. ### Workarounds The rights of the `Mail.MailConfig` page can be manually updated so that only a set of trusted users can view, edit and delete it (e.g., the `XWiki.XWikiAdminGroup` group). On 14.4.8+, 15.1-rc-1+, or 14.10.5+, if at startup `Mail.MailConfig` does not have any rig
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