CVE-2023-46743Public exploitNetwork attack vector

Unauthorized attachment editing via cached WOPI permission

Published Nov 9, 2023 · Updated Sep 4, 2024

Authorization bypass in Collabora Connector Application before 1.3 allows remote authenticated users to edit view-only attachments. DefaultWopi passes userCanWrite in a WOPI request whose value Collabora caches for the first editing session instead of reevaluating each user's rights. A view-only user must open the same file while that session remains active; the resulting access permits attachment modification.

CVSS severity4.3
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Collabora Connector Application before 1.3 allows remote authenticated users to edit view-only attachments. DefaultWopi passes userCanWrite in a WOPI request whose value Collabora caches for the first editing session instead of reevaluating each user's rights. A view-only user must open the same file while that session remains active; the resulting access permits attachment modification.

The record

CVE
CVE-2023-46743
Published
Nov 9, 2023
Updated
Sep 4, 2024
Vendor
XWiki SAS
Product
Collabora Connector Application (Pro)
Classifications
CWE-276
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3
  2. Affected versionversion=< 1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

XWiki SAS · Collabora Connector Application (Pro)version=0 <1.3; version=< 1.3

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
7.3GitHub, Inc.CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

Public exploit references

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Technologies

Your stack

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Your stack

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