CVE-2020-17530

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total 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

95.93% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

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.

Published

2020-12-11 01:11Z5 YR AGO

Last updated

2025-10-21 23:35Z10 MO AGO

Reserved

2020-08-12

Assigning CNA

apache

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')Base
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

32508addef9482ae646a61a2bedb54495d09cd9362db416516db3c3736fb9dcd

• cwiki.apache.orghttps://cwiki.apache.org/confluence/display/WW/S2-061x_refsource_CONFIRM
• jvn.jpJVN#43969166http://jvn.jp/en/jp/JVN43969166/index.htmlthird-party-advisoryx_refsource_JVN
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2021.htmlx_refsource_MISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/160721/Apache-Struts-2-Forced-Multi-OGNL-Evaluation.htmlx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210115-0005/x_refsource_CONFIRM
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com//security-alerts/cpujul2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlx_refsource_MISC
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlx_refsource_MISC
• www.openwall.com[oss-security] 20220412 CVE-2021-31805: Apache Struts: Forced OGNL evaluation, when evaluated on raw not validated user input in tag attributes, may lead to RCE.http://www.openwall.com/lists/oss-security/2022/04/12/6mailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlx_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17530government-resource