CVE-2021-27961

MEDIUMNVD 6.56.5—Elevated

6.5

evesys 7.1 (2152) through 8.0 (2202) allows Reflected XSS via the indexeva.php action parameter.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 10.6%
KEV: Not listed

Published

July 9, 2025

Last Modified

April 15, 2026

References (2)

cve@mitrehttps://evasys.de/en/blog/
cve@mitrehttps://gist.github.com/phlmox/c24bf28f12fbc0f2ea73dd9e8cfa94e3

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-79Cross-site Scripting (XSS)

Data Freshness Timeline

(refreshed 11× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-21 14:55 UTCEPSS rescore
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2026-05-21 11:28 UTCEG score recompute
2026-05-21 11:28 UTCGHSA enrichment
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Frequently asked(5)

What is CVE-2021-27961?

CVE-2021-27961 is a medium vulnerability published on July 9, 2025. evesys 7.1 (2152) through 8.0 (2202) allows Reflected XSS via the indexeva.php action parameter.

When was CVE-2021-27961 disclosed?

CVE-2021-27961 was first published in the National Vulnerability Database on July 9, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27961 actively exploited?

CVE-2021-27961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27961?

CVE-2021-27961 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2021-27961?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27961, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2021-27961

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CVE-2021-27961

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-27961?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)