CVE-2021-29451 json
Missing validation of JWT signature in `ManyDesigns/Portofino`
published 2021-04-16 5 y ago modified 2026-07-08 4 mo ago also GHSA-6g3c-2mh5-7q6x , EUVD-2021-0773
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
Portofino is an open source web development framework. Portofino before version 5.2.1 did not properly verify the signature of JSON Web Tokens. This allows forging a valid JWT. The issue will be patched in the upcoming 5.2.1 release.
Patch / fix
- maven com.manydesigns:portofino-dispatcher 5.2.1
- maven com.manydesigns:portofino-core 5.2.1
- manydesigns portofino 5.2.1
Exploit prediction
0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | com.manydesigns:portofino-dispatcher | >=5.0.0, <5.2.1 |
5.2.1 |
| maven | com.manydesigns:portofino-core | >=5.0.0, <5.2.1 |
5.2.1 |
Affected products
- ManyDesigns Portofino
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
References
-
github.com
/ManyDesigns/Portofino/commit/8c754a0ad234555e813dcbf9e57d637f9f23d8fb
web, patch, third-party-advisory
-
github.com
/ManyDesigns/Portofino/security/advisories/GHSA-6g3c-2mh5-7q6x
web, third-party-advisory
-
mvnrepository.com
/artifact/com.manydesigns/portofino
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-29451
advisory
Sources
- CVE List CVE-2021-29451
- GitHub Advisory GHSA-6g3c-2mh5-7q6x
- NVD CVE-2021-29451
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.