How severe is CVE-2021-31862?

CVE-2021-31862 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-31862 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31862?

CVE-2021-31862 affects Sysaid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31862?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-31862 published?

CVE-2021-31862 was published on 2021-10-29 and last updated on 2026-06-17.

CVE-2021-31862

CVE-2021-31862 is a medium-severity vulnerability in Sysaid with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sysaid
Published: 2021-10-29
Last modified: 2026-06-17

Description

SysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication.

Frequently asked questions

What is CVE-2021-31862?: SysAid 20.4.74 allows XSS via the KeepAlive.jsp stamp parameter without any authentication.
How severe is CVE-2021-31862?: CVE-2021-31862 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-31862 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31862?: CVE-2021-31862 affects Sysaid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31862?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31862 published?: CVE-2021-31862 was published on 2021-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sysaid:sysaid:20.4.74:*:*:*:*:*:*:*

More vulnerabilities in Sysaid

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CVE-2025-2776 — Critical (CVSS 9.3): SysAid On-Prem versions <= 23.3.40 are vulnerable to an unauthenticated XML External Entity (XXE) vulnerability in the…
CVE-2025-2775 — Critical (CVSS 9.3): SysAid On-Prem versions <= 23.3.40 are vulnerable to an unauthenticated XML External Entity (XXE) vulnerability in the…
CVE-2024-36394 — Critical (CVSS 9.1): SysAid - CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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