CVE-2023-48240Public exploitNetwork attack vector

Session cookie theft via rendered diff image fetching

Published Nov 20, 2023 · Updated Aug 2, 2024

SSRF in affected XWiki Platform releases allows remote authenticated users to expose session cookies through rendered image diffs. The XML diff converter fetches attacker-supplied image URLs server-side, forwards the viewer's cookies cross-domain, and caches successful responses without user isolation. Exploitation requires a user to view the crafted diff; exposed cookies permit impersonation, while cached responses can disclose protected content.

CVSS severity9.0
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in affected XWiki Platform releases allows remote authenticated users to expose session cookies through rendered image diffs. The XML diff converter fetches attacker-supplied image URLs server-side, forwards the viewer's cookies cross-domain, and caches successful responses without user isolation. Exploitation requires a user to view the crafted diff; exposed cookies permit impersonation, while cached responses can disclose protected content.

The record

CVE
CVE-2023-48240
Published
Nov 20, 2023
Updated
Aug 2, 2024
Vendor
CryptPad
Product
XWiki Platform
Classifications
CWE-918, CWE-281, CWE-201, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 11.10.1, < 14.10.15
  2. Affected versionversion=>= 15.0-rc-1, < 15.5.1
  3. Affected versionversion=>= 15.6-rc-1, < 15.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CryptPad · XWiki Platformversion=>= 11.10.1, < 14.10.15; version=>= 15.0-rc-1, < 15.5.1; version=>= 15.6-rc-1, < 15.6

Published CVSS scores

9.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-918Server-Side Request Forgery (SSRF)
CWE-281Improper Preservation of Permissions
CWE-201Insertion of Sensitive Information Into Sent Data
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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