CVE-2021-40822

GeoServer through 2.18.5 and 2.19.x through 2.19.2 allows SSRF via the option for setting a proxy host.

Published: 2022-05-02 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-40822 is rated High Risk (69.9/100): CVSS High severity, with high exploitation likelihood (EPSS 93.25%, 100th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +8.63% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize 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-2021-40822

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 2025-11-21 84.62% 93.25% +8.63%
2 2025-11-18 93.25% 84.62% -8.63%
3 2025-08-20 — 93.25% —

Full EPSS history (58 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-40822

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]
5.0 2.0 MEDIUM
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2021-40822

GitHub Security Advisory for CVE-2021-40822

GHSA-rr33-j5p5-ppf8 · Severity: high · Ecosystem: maven — GeoServer allows SSRF via the option for setting a proxy host

Affected software / configurations for CVE-2021-40822

Vendor Product Version Raw CPE
osgeo geoserver <= 2.18.5 cpe:2.3:a:osgeo:geoserver:*:*:*:*:*:*:*:*
osgeo geoserver >= 2.19.0, < 2.19.3 cpe:2.3:a:osgeo:geoserver:*:*:*:*:*:*:*:*

References for CVE-2021-40822

cvelogic Threat Intelligence