CVE-2017-12621
During Jelly (xml) file parsing with Apache Xerces, if a custom doctype entity is declared with a "SYSTEM" entity with a URL and that…
- 9.8CriticalCVSS base score
- 8.1%Exploitation in 30 daysEPSS · top 5.1% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
During Jelly (xml) file parsing with Apache Xerces, if a custom doctype entity is declared with a "SYSTEM" entity with a URL and that entity is used in the body of the Jelly file, during parser instantiation the parser will attempt to connect to said URL. This could lead to XML External Entity (XXE) attacks in Apache Commons Jelly before 1.0.1.
Timeline
ID reserved
By apache
- 51 days later
· 51 days later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 8.1% · top 5.1% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
Apache Software Foundation · Apache Commons Jelly
- affected 1.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencommons-jelly:commons-jellyGHSA-6g33-82gc-3pw5 (opens in a new tab)
References
References4
- https://issues.apache.org/jira/browse/JELLY-293 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [dev] 20170927 [SECURITY] CVE-2017-12621 Apache Commons Jelly connects to URL with custom doctype definitions. (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 101052 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 1039444 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-2787 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6g33-82gc-3pw5 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-12621)Record last updated .