CVE-2021-30640

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

9.88% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 95.1% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Low. 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.

Published

2021-07-12 14:55Z5 YR AGO

Last updated

2026-10-08 21:03Z20 DAYS AGO

Reserved

2021-04-13

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-116Improper Encoding or Escaping of OutputClass
• CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

d0f80fed6e5b175203972dd3b0e3f127ceec1db003e015c18c6297c658ab4c10

• lists.apache.orghttps://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3Ex_refsource_MISC
• www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210805 [SECURITY] [DLA 2733-1] tomcat8 security updatehttps://lists.debian.org/debian-lts-announce/2021/08/msg00009.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-4952https://www.debian.org/security/2021/dsa-4952vendor-advisoryx_refsource_DEBIAN
• www.debian.orgDSA-4986https://www.debian.org/security/2021/dsa-4986vendor-advisoryx_refsource_DEBIAN
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210827-0007/x_refsource_CONFIRM
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
• security.gentoo.orgGLSA-202208-34https://security.gentoo.org/glsa/202208-34vendor-advisoryx_refsource_GENTOO