CVE-2021-38490

HIGHNVD 7.57.5—

7.5

Altova MobileTogether Server before 7.3 SP1 allows XML exponential entity expansion, a different vulnerability than CVE-2021-37425.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 54.8%
KEV: Not listed

Published

August 10, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://www.redteam-pentesting.de/advisories/rt-sa-2021-002
af854a3a-2127-422b-91ae-364da2661108https://www.redteam-pentesting.de/advisories/rt-sa-2021-002

Weakness Classification(1)

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

CWE-776Improper Restriction of Recursive Entity References (XML Entity Expansion)

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 12:19 UTCEG score recompute
2026-05-26 12:19 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-38490?

CVE-2021-38490 is a high vulnerability published on August 10, 2021. Altova MobileTogether Server before 7.3 SP1 allows XML exponential entity expansion, a different vulnerability than CVE-2021-37425.

When was CVE-2021-38490 disclosed?

CVE-2021-38490 was first published in the National Vulnerability Database on August 10, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-38490 actively exploited?

CVE-2021-38490 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 54.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-38490?

CVE-2021-38490 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-38490?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-38490, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-38490

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Is Your Infrastructure Affected by CVE-2021-38490?

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CVE-2021-38490

📅 Published

🔄 Last Modified

🔗 References (2)