ColdFusion versions 2025

CVE-2026-48313 is a pre-authentication path traversal in Adobe ColdFusion's bundled CKEditor filemanager connector, reachable at /cf_scripts/scripts/ajax/ckeditor/plugins/filemanager/filemanager.cfc. A single unauthenticated GET request with ../ sequences in the path parameter lets an attacker read arbitrary files on the server — and perform limited writes — without any credentials or special server configuration. Affected versions are ColdFusion 2025 Update 9 and earlier and ColdFusion 2023 Update 20 and earlier; Adobe patched it in Update 10 and Update 21 respectively. The trigger is embarrassingly simple: GET /cf_scripts/scripts/ajax/ckeditor/plugins/filemanager/filemanager.cfc?method=getfmfiles&path=../../../../../../../../... The patch adds RdsFileSecurity.resolveCanonical() to normalize paths and reject traversal sequences.

Adobe rated this CRITICAL at 9.3, and the CVSS vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N) is technically accurate: pre-auth, remote, changed scope into the OS filesystem, high confidentiality impact. However, the 9.3 overstates operational urgency relative to its sibling CVE-2026-48282 (CVSS 10.0), which delivers full RCE through the RDS subsystem, is already KEV-listed, and was weaponized within two hours of patch release. CVE-2026-48313 reads files and can perform limited writes — extremely dangerous for credential harvesting but not direct code execution. With only ~775 ColdFusion instances internet-exposed per Shadowserver and no confirmed exploitation of *this* CVE, we downgrade to HIGH 8.5. That said, threat actors already probing for CVE-2026-48282 will discover this endpoint during the same recon pass, so weaponization is a matter of when, not if.

Why this verdict

• Pre-auth on a default endpoint — no credentials, no RDS enablement, no user interaction required. The CKEditor filemanager connector at /cf_scripts/ is served by default on every ColdFusion installation, making every unpatched instance exploitable with a single GET request. This justifies staying well above MEDIUM.
• File read, not RCE — while the CVSS vector justifiably scores high confidentiality impact (C:H), the operational ceiling is information disclosure plus limited file writes, not direct arbitrary code execution. The sibling CVE-2026-48282 delivers actual RCE and is the one that belongs at CRITICAL. This distinction compresses the score from 9.3 down to 8.5.
• Small internet-facing footprint — Shadowserver tracks only ~775 ColdFusion instances exposed to the internet globally. Most enterprise CF deployments sit behind reverse proxies or WAFs. This limits mass-exploitation surface compared to vulnerabilities in Apache, nginx, or Exchange.
• Role multiplier: web application server with credential exposure — ColdFusion is not canonically a high-value-role component (not a DC, hypervisor, IdP). However, ColdFusion config files routinely contain database connection strings, LDAP bind credentials, and admin hashes that are reversibly encrypted. The file-read → credential-harvest → database/AD-compromise chain succeeds in realistic deployments, making the blast radius potentially tenant-to-domain-scale. This floors the verdict at HIGH and prevents a downgrade to MEDIUM.
• Sibling CVE under active mass exploitation — CVE-2026-48282 (CVSS 10.0 RCE) was weaponized within 2 hours of APSB26-68 publication and is KEV-listed. Threat actors already scanning ColdFusion infrastructure will encounter the CKEditor filemanager endpoint during the same reconnaissance pass. The probability of opportunistic exploitation of CVE-2026-48313 is elevated even though no in-the-wild activity has been confirmed for this specific CVE.

Why not higher?

File read with limited write is not RCE; the blast radius on a single ColdFusion server requires an additional exploitation step — credential reuse, webshell upload via the limited-write capability, or chaining with another vulnerability — to escalate to code execution. ColdFusion is not canonically a high-value-role component (not a DC, hypervisor, IdP, CA, or network edge appliance), so the CRITICAL floor does not apply. Only ~775 instances are internet-exposed, and this specific CVE has no confirmed in-the-wild exploitation, unlike its CVSS 10.0 sibling.

Why not lower?

The vulnerability is pre-authentication, requires zero user interaction, hits a default-accessible endpoint with no special configuration, and is trivially exploitable via a single GET request — the lowest possible friction for initial access. Attackers are already actively scanning ColdFusion instances due to CVE-2026-48282, making opportunistic exploitation of CVE-2026-48313 highly likely in the near term. The credential-harvesting potential (database connection strings, LDAP bind passwords, admin password hashes in neo-security.xml and neo-datasource.xml) extends blast radius well beyond the ColdFusion host itself, flooring the verdict at HIGH.

1. Block /cf_scripts/ and /CFIDE/ at the reverse proxy or WAF — The CKEditor filemanager connector lives under /cf_scripts/scripts/ajax/ckeditor/. Blocking this entire path tree at the reverse proxy (nginx, Apache, F5, Cloudflare) eliminates the attack surface without touching ColdFusion itself. If your application legitimately uses CKEditor features, allowlist only the specific .js and .css assets and block all .cfc and .cfm requests under that path. Deploy within 30 days per the noisgate mitigation SLA for HIGH.
2. Network-segment ColdFusion servers off the public internet — Only ~775 ColdFusion instances are internet-exposed, but yours should not be among them. Place ColdFusion behind a reverse proxy that terminates TLS and forwards only application routes. Block direct access to ColdFusion's built-in web server ports (8500, 8501). This eliminates pre-auth exploitation from the internet entirely. Deploy within 30 days.
3. Rotate all credentials stored in ColdFusion config files — Assume that if the instance was exposed and unpatched between June 30 and today, config files may have been read. Rotate database passwords, LDAP bind credentials, ColdFusion admin passwords, and any API keys stored in .cfm source or XML config files. This limits the blast radius of any prior exploitation. Perform immediately if the server was internet-exposed while unpatched.
4. Enable WAF path-traversal rules — Configure your WAF to detect and block ../ sequences and encoded variants (%2e%2e%2f, ..%5c, etc.) in query parameters targeting ColdFusion endpoints. Most commercial WAFs (Cloudflare, AWS WAF, F5 ASM, Imperva) have pre-built rulesets for path traversal. Deploy within 30 days.
5. Apply Adobe's ColdFusion lockdown guide — Adobe publishes a lockdown guide that removes or restricts access to /cf_scripts/, /CFIDE/, and other administrative paths. Following this guide eliminates multiple attack surfaces simultaneously, including this CVE and future CKEditor-related vulnerabilities. Deploy within 30 days.

Run from an auditor workstation or CI pipeline against each ColdFusion host. No authentication needed — this is a remote HTTP check. Invoke as: bash check_cve_2026_48313.sh https://coldfusion.example.com. Requires only curl.

#!/usr/bin/env bash
# CVE-2026-48313 - ColdFusion CKEditor Filemanager Path Traversal Check
# Checks whether the CKEditor filemanager endpoint is reachable and
# responds to a benign parent-directory traversal.
# Exit codes: 0 = PATCHED, 1 = VULNERABLE, 2 = UNKNOWN

set -euo pipefail

TARGET="${1:?Usage: $0 <https://coldfusion-host>}"
ENDPOINT="/cf_scripts/scripts/ajax/ckeditor/plugins/filemanager/filemanager.cfc"

echo "[*] Checking ${TARGET} for CVE-2026-48313..."

# Step 1: Probe the CKEditor filemanager endpoint
HTTP_CODE=$(curl -sk -o /dev/null -w "%{http_code}" --max-time 10 \
  "${TARGET}${ENDPOINT}?method=getfmfiles&path=." 2>/dev/null || echo "000")

if [ "$HTTP_CODE" = "000" ]; then
  echo "UNKNOWN - Could not connect to ${TARGET}"
  exit 2
elif [ "$HTTP_CODE" = "404" ]; then
  echo "PATCHED - CKEditor filemanager endpoint not found (HTTP 404)"
  exit 0
elif [ "$HTTP_CODE" = "403" ]; then
  echo "PATCHED - CKEditor filemanager endpoint blocked (HTTP 403)"
  exit 0
fi

# Step 2: Test a benign parent-directory traversal
BODY=$(curl -sk --max-time 10 \
  "${TARGET}${ENDPOINT}?method=getfmfiles&path=../" 2>/dev/null || echo "")

if echo "$BODY" | grep -qiE 'denied|blocked|invalid|canonical|security|restrict'; then
  echo "PATCHED - Path traversal blocked by canonicalization fix"
  exit 0
elif echo "$BODY" | grep -qiE 'filename|directory|lastmodified|size|name'; then
  echo "VULNERABLE - Directory listing returned for traversal path"
  exit 1
else
  echo "UNKNOWN - Endpoint responded (HTTP ${HTTP_CODE}) but output is ambiguous"
  echo "[*] Verify manually: CF 2025 >= Update 10 or CF 2023 >= Update 21 = PATCHED"
  exit 2
fi

Sources

1. Adobe Security Bulletin APSB26-68
2. Horizon3.ai — CVE-2026-48283 / CVE-2026-48313 Advisory
3. WatchTowr Labs — APSB26-68 ColdFusion CVE Bonanza
4. Greenbone — CVE-2026-48282 Active Exploitation Analysis
5. SecurityWeek — Adobe Patches Critical ColdFusion Vulnerabilities
6. The Hacker News — Adobe Patches 7 CVSS 10.0 Flaws
7. CyberSecurityNews — Multiple Adobe ColdFusion Vulnerabilities
8. Adobe — Disabling/Enabling ColdFusion RDS