Answer in brief
CVE-2021-25122 records a High severity (CVSS 7.5) vulnerability in Exposure of Sensitive Information to an Unauthorized Actor in Apache Tomcat. The current sources do not mark it as known exploited. The current feed maps org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven), org.apache.tomcat.embed:tomcat-embed-core (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone10:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone8:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:10.0.0:milestone9:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone10:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone11:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone12:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone13:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone14:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone15:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone16:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone17:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone18:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone19:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone20:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone21:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone22:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone23:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone24:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone25:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone26:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone27:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:apache:tomcat:9.0.0:milestone5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.3:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:agile_product_lifecycle_management:9.3.6:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:communications_cloud_native_core_security_edge_protection_proxy:1.6.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:communications_instant_messaging_server:10.0.1.5.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:database:12.2.0.1:*:*:*:enterprise:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:database:19c:*:*:*:enterprise:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:database:21c:*:*:*:enterprise:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:graph_server_and_client:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:graph_server_and_client:21.3.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:oracle:siebel_ui_framework:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=8.5.0,<8.5.63 | 8.5.63 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=10.0.0-M1,<10.0.2 | 10.0.2 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=9.0.0-M1,<9.0.43 | 9.0.43 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=10.0.0-M1 <10.0.2 | 10.0.2 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=9.0.0-M1 <9.0.43 | 9.0.43 |
| org.apache.tomcat.embed:tomcat-embed-coremaven | >=8.5.0 <8.5.63 | 8.5.63 |
| org.apache.tomcat:tomcat-coyotemaven | >=10.0.0-M1,<10.0.2 | 10.0.2 |
| org.apache.tomcat:tomcat-coyotemaven | >=10.0.0-M1 <10.0.2 | 10.0.2 |
Published upstream
Mar 1, 2021
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Jun 11, 2026
When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.
Quoted source text, attributed separately from HOL analysis.