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CVE-2020-23355

22
FAUCET Score

CVE-2020-23355 describes a critical authentication bypass vulnerability in Codiad 2.8.4, specifically within the Authenticate() function of class.user.php. This flaw allows attackers to bypass authentication using "magic hashes," where certain encrypted or hashed password formats (e.g., starting with "0e") are incorrectly validated, enabling unauthorized access. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network without requiring any user interaction or privileges, potentially leading to a complete compromise of integrity. Despite its severity, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it has not been observed in active exploitation or garnered significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.8.4CPE matchmatch criteria
cpe:2.3:a:codiad:codiad:2.8.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 34th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

composerGHSA-8fhh-hf9w-55p7high

Codiad Vulnerable to PHP Magic Hash Vulnerability

May 24, 2022

References

github.com / Codiad/Codiad/issues/1121
Third Party Advisory