CVE-2021-20454 json
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML d…
published 2021-04-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7872
- cvss
- 8.2
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.8%
- EPSS 2.8% chance of exploitation in 30 days, percentile 86%
- public exploits
- 0
- none known
Summary
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 196649.
Exploit prediction
2.79% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.2 | CVSS:3.0/I:N/PR:N/AC:L/A:L/UI:N/AV:N/S:U/C:H/RL:O/E:U/RC:C |
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L |
| CNA | 3.0 | 8.2 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:N/A:P |
Affected products
- IBM WebSphere Application Server
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
ibm.com
/support/pages/node/6445481
third-party-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/196649
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2021-20454
- NVD CVE-2021-20454
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.