CVE-2021-25963 json
Shuup - Reflected XSS in Error Page
published 5y ago modified 4mo ago also GHSA-5pcx-vqjp-p34w , PYSEC-2021-350 , EUVD-2021-0240
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
In Shuup, versions 1.6.0 through 2.10.8 are vulnerable to reflected Cross-Site Scripting (XSS) that allows execution of arbitrary javascript code on a victim browser. This vulnerability exists due to the error page contents not escaped.
Patch / fix
Is CVE-2021-25963 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 FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | shuup | >=1.6.0, <2.11.0 |
2.11.0 |
Affected products
- shuup shuup
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/shuup/shuup/commit/75714c37e32796eb7cbb0d977af5bcaa26573588
web, patch, third-party-advisory
-
whitesourcesoftware.com
/vulnerability-database/CVE-2021-25963
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-25963
advisory
-
github.com
/pypa/advisory-database/tree/main/vulns/shuup/PYSEC-2021-350.yaml
web
-
github.com
/shuup/shuup
package
-
github.com
/advisories/GHSA-5pcx-vqjp-p34w
advisory
Sources
- CVE List CVE-2021-25963
- GitHub Advisory GHSA-5pcx-vqjp-p34w
- NVD CVE-2021-25963
- OSV PYSEC-2021-350
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.