How severe is CVE-2021-40822?

CVE-2021-40822 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-40822?

CVE-2021-40822 affects the following packages: org.geoserver:gs-main (Maven), org.geoserver:gs-main (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-40822?

No fixed version has been published for CVE-2021-40822 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2021-40822 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-40822 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2021-40822?

CVE-2021-40822 has an EPSS (Exploit Prediction Scoring System) score of 93.3%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2021-40822?

CVE-2021-40822 is classified as Server-Side Request Forgery (SSRF) (CWE-918). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Is there exploit tooling available for CVE-2021-40822?

A Nuclei detection template exists for CVE-2021-40822, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2021-40822 published, and has it been updated?

CVE-2021-40822 was published on May 2, 2022 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

CVE-2021-40822

HIGH

GeoServer allows SSRF via the option for setting a proxy host

Also known asGHSA-rr33-j5p5-ppf8

Published

May 2, 2022

Updated

Apr 10, 2026

Affected

2 pkgs

Patched

None yet

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

93.3%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

2 pkgs affected

☕org.geoserver:gs-main☕org.geoserver:gs-main

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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

Affected Packages

2 total

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.geoserver:gs-main`	all versions	No fix
☕Maven	`org.geoserver:gs-main`	≥ 2.19.0	No fix

Frequently Asked Questions

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

O3 Security · Impact-Aware SCA

Is CVE-2021-40822 in your stack?

O3 detects CVE-2021-40822 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works