CVE-2020-9484
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server;
02 Description
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server;
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 55.52% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 99.0% of scored records. A rank, not a probability.
- NVD base score
- 7.0 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-08.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-05-20 18:26Z6 YR AGO
- Last updated
- 2026-10-08 21:03Z20 DAYS AGO
- Reserved
- 2020-03-01
- Assigning CNA
- apache
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-502Deserialization of Untrusted DataBase
- Data version
- 5.2
- Document digest
- f22683515aeca84da7458e3c0740ae4fd5db02577edac5f9a85b5d27b61d4848
05 Affected products
06 References
- lists.apache.org[tomcat-users] 20200521 Re: [SECURITY] CVE-2020-9484 Apache Tomcat Remote Code Execution via session persistencehttps://lists.apache.org/thread.html/rf70f53af27e04869bdac18b1fc14a3ee529e59eb12292c8791a77926%40%3Cusers.tomcat.apache.org%3E
- lists.debian.org[debian-lts-announce] 20200523 [SECURITY] [DLA 2217-1] tomcat7 security updatehttps://lists.debian.org/debian-lts-announce/2020/05/msg00020.html
- lists.apache.org[tomcat-users] 20200524 Re: [SECURITY] CVE-2020-9484 Apache Tomcat Remote Code Execution via session persistencehttps://lists.apache.org/thread.html/r26950738f4b4ca2d256597cf391d52d3450fa665c297ea5ca38f5469%40%3Cusers.tomcat.apache.org%3E
- lists.opensuse.orgopenSUSE-SU-2020:0711http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00057.html
- lists.apache.org[tomcat-dev] 20200527 Re: [SECURITY] CVE-2020-9484 Apache Tomcat Remote Code Execution via session persistencehttps://lists.apache.org/thread.html/r7bc247fffcb1d58415215c861d2354bd653c86266230d78a93c71ae2%40%3Cdev.tomcat.apache.org%3E
- lists.debian.org[debian-lts-announce] 20200528 [SECURITY] [DLA 2209-1] tomcat8 security updatehttps://lists.debian.org/debian-lts-announce/2020/05/msg00026.html
- seclists.org20200602 [CVE-2020-9484] Apache Tomcat RCE via PersistentManagerhttp://seclists.org/fulldisclosure/2020/Jun/6
- security.gentoo.orgGLSA-202006-21https://security.gentoo.org/glsa/202006-21
- lists.fedoraproject.orgFEDORA-2020-ce396e7d5chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJ7XHKWJWDNWXUJH6UB7CLIW4TWOZ26N/
- lists.fedoraproject.orgFEDORA-2020-d9169235a8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIQHXENTLYUNOES4LXVNJ2NCUQQRF5VJ/
- lists.apache.org[tomcat-dev] 20200625 svn commit: r1879208 - in /tomcat/site/trunk: docs/security-10.html docs/security-8.html docs/security-9.html xdocs/security-10.xml xdocs/security-8.xml xdocs/security-9.xmlhttps://lists.apache.org/thread.html/rb1c0fb105ce2b93b7ec6fc1b77dd208022621a91c12d1f580813cfed%40%3Cdev.tomcat.apache.org%3E
- lists.debian.org[debian-lts-announce] 20200712 [SECURITY] [DLA 2279-1] tomcat8 security updatehttps://lists.debian.org/debian-lts-announce/2020/07/msg00010.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2020.html
- lists.apache.orghttps://lists.apache.org/thread.html/r77eae567ed829da9012cadb29af17f2df8fa23bf66faf88229857bb1%40%3Cannounce.tomcat.apache.org%3E
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20200528-0005/
- packetstormsecurity.comhttp://packetstormsecurity.com/files/157924/Apache-Tomcat-CVE-2020-9484-Proof-Of-Concept.html
- www.debian.orgDSA-4727https://www.debian.org/security/2020/dsa-4727
- usn.ubuntu.comUSN-4448-1https://usn.ubuntu.com/4448-1/
- lists.apache.org[tomee-commits] 20201013 [jira] [Created] (TOMEE-2909) Impact of security vulnerability(CVE-2020-9484) on TOMEE plus (7.0.7)https://lists.apache.org/thread.html/r123b3ebe389f46f9d337923f393cdae4d3e9b78d982d706712f0898c%40%3Ccommits.tomee.apache.org%3E
- lists.apache.org[tomee-commits] 20201013 [jira] [Updated] (TOMEE-2909) Impact of security vulnerability(CVE-2020-9484) on TOMEE plus (7.0.7)https://lists.apache.org/thread.html/raa4123e472175bb052fbba165d37187cea923f755e8f3f30d124cb3f%40%3Ccommits.tomee.apache.org%3E
- lists.apache.org[tomee-commits] 20201013 [jira] [Assigned] (TOMEE-2909) Impact of security vulnerability(CVE-2020-9484) on TOMEE plus (7.0.7)https://lists.apache.org/thread.html/rc8473b08abdf3c16494ed817bec1717a0ee0c8080315bc27db5f21c3%40%3Ccommits.tomee.apache.org%3E
- lists.apache.org[tomee-commits] 20201013 [jira] [Commented] (TOMEE-2909) Impact of security vulnerability(CVE-2020-9484) on TOMEE plus (7.0.7)https://lists.apache.org/thread.html/rf59c72572b9fee674a5d5cc6afeca4ffc3918a02c354a81cc50b7119%40%3Ccommits.tomee.apache.org%3E
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2020.html
- kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10332
- usn.ubuntu.comUSN-4596-1https://usn.ubuntu.com/4596-1/
- www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2021.html
- lists.apache.org[tomcat-dev] 20210301 [SECURITY] CVE-2021-25329 Apache Tomcat Incomplete fix for CVE-2020-9484 (RCE via session persistence)https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cdev.tomcat.apache.org%3E
- lists.apache.org[announce] 20210301 [SECURITY] CVE-2021-25329 Apache Tomcat Incomplete fix for CVE-2020-9484 (RCE via session persistence)https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cannounce.apache.org%3E
- lists.apache.org[tomcat-users] 20210301 [SECURITY] CVE-2021-25329 Apache Tomcat Incomplete fix for CVE-2020-9484 (RCE via session persistence)https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cusers.tomcat.apache.org%3E
- lists.apache.org[tomcat-dev] 20210301 svn commit: r1887027 - in /tomcat/site/trunk: docs/security-10.html docs/security-7.html docs/security-8.html docs/security-9.html xdocs/security-10.xml xdocs/security-7.xml xdocs/security-8.xml xdocs/security-9.xmlhttps://lists.apache.org/thread.html/rf6d5d57b114678d8898005faef31e9fd6d7c981fcc4ccfc3bc272fc9%40%3Cdev.tomcat.apache.org%3E
- lists.apache.org[tomcat-announce] 20210301 [SECURITY] CVE-2021-25329 Apache Tomcat Incomplete fix for CVE-2020-9484 (RCE via session persistence)https://lists.apache.org/thread.html/rfe62fbf9d4c314f166fe8c668e50e5d9dd882a99447f26f0367474bf%40%3Cannounce.tomcat.apache.org%3E
- www.openwall.com[oss-security] 20210301 CVE-2021-25329: Apache Tomcat Incomplete fix for CVE-2020-9484http://www.openwall.com/lists/oss-security/2021/03/01/2
- lists.apache.org[tomee-commits] 20210522 [jira] [Closed] (TOMEE-2909) Impact of security vulnerability(CVE-2020-9484) on TOMEE plus (7.0.7)https://lists.apache.org/thread.html/r8dd19c514face6dd85fd4eab0271854883f40c7307926c1f7cd5400c%40%3Ccommits.tomee.apache.org%3E
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.html
- lists.apache.org[tomcat-users] 20210701 What is "h2c"? What is CVE-2021-25329? Re: Most recent security-related update to 8.5https://lists.apache.org/thread.html/r8a2ac0e476dbfc1e6440b09dcc782d444ad635d6da26f0284725a5dc%40%3Cusers.tomcat.apache.org%3E
- lists.apache.org[tomcat-users] 20210701 Re: What is "h2c"? What is CVE-2021-25329? Re: Most recent security-related update to 8.5https://lists.apache.org/thread.html/rb51ccd58b2152fc75125b2406fc93e04ca9d34e737263faa6ff0f41f%40%3Cusers.tomcat.apache.org%3E
- lists.apache.org[tomcat-users] 20210702 Re: CVE-2021-25329, was Re: Most recent security-related update to 8.5https://lists.apache.org/thread.html/r11ce01e8a4c7269b88f88212f21830edf73558997ac7744f37769b77%40%3Cusers.tomcat.apache.org%3E
- lists.apache.org[tomcat-dev] 20210712 svn commit: r1891484 - in /tomcat/site/trunk: docs/security-10.html docs/security-7.html docs/security-8.html docs/security-9.html xdocs/security-10.xml xdocs/security-7.xml xdocs/security-8.xml xdocs/security-9.xmlhttps://lists.apache.org/thread.html/rc1778b38e74b5b6142414d57623bd55b023a72361f422836782fca3c%40%3Cdev.tomcat.apache.org%3E
- www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.html
- www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
07 Fixed in
Arch Linux
- tomcat9 Fixed in 9.0.35-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- tomcat9 Fixed in 9.0.35-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- tomcat9 Fixed in 9.0.35-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- tomcat9 Fixed in 9.0.35-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- tomcat8 Fixed in 8.0.32-1ubuntu1.13
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- tomcat9 Fixed in 9.0.16-3ubuntu0.18.04.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- tomcat9 Fixed in 9.0.31-1ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- tomcat7 Fixed in 7.0.52-1ubuntu0.16+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- tomcat7 Fixed in 7.0.68-1ubuntu0.4+esm2Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- tomcat7 Fixed in 7.0.78-1ubuntu0.1~esm1Available with Ubuntu Pro: https://ubuntu.com/pro
- tomcat8 Fixed in 8.5.39-1ubuntu1~18.04.3+esm2Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.