CVE-2023-20883

In Spring Boot versions 3.0.0 - 3.0.6, 2.7.0 - 2.7.11, 2.6.0 - 2.6.14, 2.5.0 - 2.5.14 and older unsupported versions, there is potential for a denial-of-service (DoS) attack if Spring MVC is used together with a reverse proxy cache.

Published: 2023-05-26 Last update: 2025-01-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-20883 is rated Moderate Risk (56.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.80%). 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-2023-20883

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 2026-06-13 0.69% 0.80% +0.11%
2 2026-03-22 0.65% 0.69% +0.04%
3 2026-03-21 — 0.65% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-20883

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:N/I:N/A:H 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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-20883

GitHub Security Advisory for CVE-2023-20883

GHSA-xf96-w227-r7c4 · Severity: high · Ecosystem: maven — Spring Boot Welcome Page Denial of Service

OS Trackers for CVE-2023-20883

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2023-20883

Affected software / configurations for CVE-2023-20883

Vendor Product Version Raw CPE
vmware spring_boot < 2.5.14 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 2.6.0, <= 2.6.14 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 2.7.0, <= 2.7.11 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*
vmware spring_boot >= 3.0.0, <= 3.0.6 cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*

References for CVE-2023-20883

cvelogic Threat Intelligence