CVE-2022-28923Public exploitNetwork attack vector

Phishing redirects via double-decoded static-file paths

Published Feb 6, 2023 · Updated Mar 26, 2025

Open redirect in Caddy before 2.5.0-beta.1 allows remote attackers to send users to attacker-chosen sites via crafted static-file URLs. SanitizedPathJoin applies url.PathUnescape to an already decoded request path, causing encoded backslashes and traversal segments to become a scheme-relative redirect target. No authentication is required, but a user must follow the crafted link; the resulting 308 redirect supports phishing without reported server compromise.

CVSS severity6.1
Medium
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Caddy before 2.5.0-beta.1 allows remote attackers to send users to attacker-chosen sites via crafted static-file URLs. SanitizedPathJoin applies url.PathUnescape to an already decoded request path, causing encoded backslashes and traversal segments to become a scheme-relative redirect target. No authentication is required, but a user must follow the crafted link; the resulting 308 redirect supports phishing without reported server compromise.

The record

CVE
CVE-2022-28923
Published
Feb 6, 2023
Updated
Mar 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing Link

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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