CVE-2020-13258 json
Cross-site scripting in Contentful
published 6y ago modified 4mo ago also GHSA-g5j6-r3x9-gf2m , PYSEC-2026-626 , EUVD-2021-1319
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.1%
- EPSS 2.1% chance of exploitation in 30 days, percentile 81%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
Contentful through 2020-05-21 for Python allows reflected XSS, as demonstrated by the api parameter to the-example-app.py.
Patch / fix
- pypi contentful 1.12.4
Is CVE-2020-13258 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.06% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template Contentful <=2020-05-21 - Cross-Site Scripting nuclei detection template
- github.com https://github.com/contentful/the-example-app.py/issues/44 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | contentful | <1.12.4 |
1.12.4 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/contentful/the-example-app.py/issues/44
web, exploit, issue-tracking, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-13258
advisory
-
pypi.org
/project/contentful
package
-
github.com
/advisories/GHSA-g5j6-r3x9-gf2m
advisory
Sources
- CVE List CVE-2020-13258
- GitHub Advisory GHSA-g5j6-r3x9-gf2m
- NVD CVE-2020-13258
- OSV PYSEC-2026-626
Fencer Intel 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.