XWiki Platform vulnerable to privilege escalation from view right on XWiki.AttachmentSelector

CVE-2023-29516 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

Any user with view rights on XWiki.AttachmentSelector can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping in the "Cancel and return to page" button. This page is installed by default.

See https://jira.xwiki.org/browse/XWIKI-20275 for the reproduction steps.

Patches

The vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11.

Workarounds

The issue can be fixed by applying this patch on XWiki.AttachmentSelector.

References

  • https://github.com/xwiki/xwiki-platform/commit/aca1d677c58563bbe6e35c9e1c29fd8b12ebb996
  • https://jira.xwiki.org/browse/XWIKI-20275

For more information

If you have any questions or comments about this advisory:

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2023-04-20 22:00:14 UTC
Updated
2023-11-04 05:06:03 UTC
GitHub reviewed
2023-04-20 22:00:14 UTC
NVD published
2023-04-18

EPSS Score

Score Percentile
15.84% 94.57%

CVSS Scores

Base score Version Severity Vector
9.9 3.1 —
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.

Identifiers

Type Value
GHSA GHSA-3989-4c6x-725f ↗
CVE CVE-2023-29516 ↗

CWEs

CWE id Name
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Affected packages (3)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.xwiki.platform:xwiki-platform-attachment-ui >= 2.0-rc-2, < 13.10.11 13.10.11 —
maven org.xwiki.platform:xwiki-platform-attachment-ui >= 14.0-rc-1, < 14.4.8 14.4.8 —
maven org.xwiki.platform:xwiki-platform-attachment-ui >= 14.5, < 14.10.1 14.10.1 —

References

cvelogic Threat Intelligence