CVE-2020-25623

Erlang/OTP 22.3.x before 22.3.4.6 and 23.x before 23.1 allows Directory Traversal. An attacker can send a crafted HTTP request to read arbitrary files, if httpd in the inets application is used.

Published: 2020-10-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-25623 is rated Moderate Risk (56.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.93%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-25623

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-08-31 0.79% 0.93% +0.15%
2 2025-03-30 2.81% 0.79% -2.03%
3 2025-03-29 — 2.81% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-25623

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-25623

OS Trackers for CVE-2020-25623

vendor priority summary link
debian not yet assigned CVE-2020-25623 not yet assigned priority: Debian including 1 source packages (erlang), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-25623
redhat low — https://access.redhat.com/security/cve/CVE-2020-25623
ubuntu medium CVE-2020-25623 medium priority: Ubuntu including 1 source packages (erlang), 5 status rows across 5 suites (bionic, focal, trusty, upstream, xenial): not-affected 4, released 1. https://ubuntu.com/security/CVE-2020-25623

Affected software / configurations for CVE-2020-25623

Vendor Product Version Raw CPE
erlang erlang\/otp >= 22.3.0, < 22.3.4.6 cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
erlang erlang\/otp >= 23.0.0, < 23.1 cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

References for CVE-2020-25623

URL Tags
https://github.com/erlang/otp/releases/tag/OTP-23.1 Release Notes Third Party Advisory
https://www.erlang.org/downloads Release Notes Vendor Advisory
https://www.erlang.org/news Vendor Advisory
cvelogic Threat Intelligence