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Oracle Critical Patch Update April 2025

Released April 2025 · Oracle's advisory ↗ · ← Critical Patch Update, January 2025 · Critical Patch Update, July 2025 →

255 CVEs in this release, one square each

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Share this chart Oracle Critical Patch Update April 2025, one square per CVE: 118 Java CVEs, 22 protected by Waratek, 11 exploited, 137 other CVEs in this release.

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By status

22Protected by Waratek8Mitigation candidate88No exploit published16Outside Waratek scope121Not applicable 11Exploited, marked by the ring

No exploit published. For 33 of them, Oracle's security advisory is the source of public detail.

Protected by Waratek. Waratek RASP can block exploitation of these on systems that have not applied the patch yet.

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Columns
Protection: None✕EPSS ≥ 0.5✕
Overview 4 matches · 0 protected · 1 exploited · 1 CISA KEV · 2 public PoC
4matches 0protected0.0% 1exploited25.0% 1CISA KEV25.0% 2public PoC50.0%
Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 2 50.0% No exploit published 2 50.0%
Critical 0 0.0% High 2 50.0% Medium 2 50.0% Low 0 0.0% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 4 100.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 1 25.0% Working exploit published 1 25.0% Proof of concept only 0 0.0% Forecast only 2 50.0% No public exploit 0 0.0%
split by peak 1 / quarter
No exploit published: 2Mitigation candidate: 2 Medium: 2High: 2 not blocked: 4 Forecast only: 2Working exploit published: 1Exploited: 1
Q3 201 Mitigation candidate1 High1 not blocked1 Working exploit published1 Q4 201 No exploit published1 Medium1 not blocked1 Forecast only1 Q1 210 Q2 210 Q3 211 No exploit published1 Medium1 not blocked1 Forecast only1 Q4 210 Q1 220 Q2 220 Q3 220 Q4 220 Q1 230 Q2 230 Q3 230 Q4 231 Mitigation candidate1 High1 not blocked1 Exploited1
Q4 20Q2 21Q4 21Q2 22Q4 22Q2 23Q4 23
4 matches Sign in to download these CVEs as CSV or JSON, or to follow them in a feed.
CVE Severity Published▾ Status Exploitation Description
CVE-2023-44487 High 2023-10-10 Mitigation candidate Exploited The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
CVE-2021-33037 Medium 2021-07-12 No exploit published Forecast only Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
CVE-2020-13943 Medium 2020-10-12 No exploit published Forecast only If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
CVE-2020-13935 High 2020-07-14 Mitigation candidate Working exploit published The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.