CVE-2021-31862 json
SysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication.
published 5y ago modified 4mo ago also EUVD-2021-18737
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.0%
- EPSS 4.0% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
SysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication.
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Check with FencerExploit prediction
3.99% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template SysAid 20.4.74 - Cross-Site Scripting nuclei detection template
- github.com https://github.com/RobertDra/CVE-2021-31862/blob/main/README.md 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 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/RobertDra/CVE-2021-31862/blob/main/README.md
exploit, third-party-advisory
-
sysaid.com
/product/on-premise/latest-release
release-notes, vendor-advisory
Sources
- CVE List CVE-2021-31862
- NVD CVE-2021-31862
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.