CVE-2020-8789 json
Composr 10.0.30 allows Persistent XSS via a Usergroup name under the Security configuration.
published 2020-05-22 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29637
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Composr 10.0.30 allows Persistent XSS via a Usergroup name under the Security configuration.
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- packetstormsecurity.com http://packetstormsecurity.com/files/157787/Composr-CMS-10.0.30-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
- seclists.org http://seclists.org/fulldisclosure/2020/May/39 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
packetstormsecurity.com
/files/157787/Composr-CMS-10.0.30-Cross-Site-Scripting.html
exploit, third-party-advisory, vdb-entry
-
seclists.org
/fulldisclosure/2020/May/39
mailing-list, exploit, third-party-advisory
Sources
- CVE List CVE-2020-8789
- NVD CVE-2020-8789
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.