CVE-2021-33491

MEDIUMNVD 6.56.5—

6.5

OX App Suite through 7.10.5 allows Directory Traversal via ../ in an OOXML or ODF ZIP archive, because of the mishandling of relative paths in mail addresses in conjunction with auto-configuration DNS records.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 89.2%
KEV: Not listed

Published

November 22, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://packetstormsecurity.com/files/165028/OX-App-Suite-Ox-Documents-7.10.x-XSS-Code-Injection-Traversal.html
cve@mitrehttps://open-xchange.com
cve@mitrehttps://seclists.org/fulldisclosure/2021/Nov/42
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/165028/OX-App-Suite-Ox-Documents-7.10.x-XSS-Code-Injection-Traversal.html
af854a3a-2127-422b-91ae-364da2661108https://open-xchange.com
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/fulldisclosure/2021/Nov/42

Weakness Classification(1)

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

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 14× in last 7d / 20× 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.

2026-06-08 14:15 UTCepss_batch
2026-06-08 14:15 UTCepss_batch
2026-06-07 15:23 UTCepss_batch
2026-06-07 15:23 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch

Frequently asked(5)

What is CVE-2021-33491?

CVE-2021-33491 is a medium vulnerability published on November 22, 2021. OX App Suite through 7.10.5 allows Directory Traversal via ../ in an OOXML or ODF ZIP archive, because of the mishandling of relative paths in mail addresses in conjunction with auto-configuration DNS records.

When was CVE-2021-33491 disclosed?

CVE-2021-33491 was first published in the National Vulnerability Database on November 22, 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-2021-33491 actively exploited?

CVE-2021-33491 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-33491?

CVE-2021-33491 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2021-33491?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33491, 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-2021-33491

Explore →

Is Your Infrastructure Affected by CVE-2021-33491?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2021-33491

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-33491?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)