CVE-2021-20353
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to an 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: 194882.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
- EPSS
- 5.16% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- ibm/websphere application server
- Source
- psirt@us.ibm.com
EPSS 5.2% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/194882VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6413709Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-174/Third Party Advisory, VDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/194882VDB Entry, Vendor Advisory
- https://www.ibm.com/support/pages/node/6413709Patch, Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-174/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.