How severe is CVE-2021-40178?

CVE-2021-40178 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-2021-40178 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40178?

CVE-2021-40178 primarily affects Zohocorp Manageengine Log360. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40178?

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

When was CVE-2021-40178 published?

CVE-2021-40178 was published on 2021-08-29 and last updated on 2026-06-17.

CVE-2021-40178

CVE-2021-40178 is a medium-severity vulnerability in Zohocorp Manageengine Log360 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: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zohocorp Manageengine Log360
Published: 2021-08-29
Last modified: 2026-06-17

Description

Zoho ManageEngine Log360 before Build 5224 allows stored XSS via the LOGO_PATH key value in the logon settings.

Frequently asked questions

What is CVE-2021-40178?: Zoho ManageEngine Log360 before Build 5224 allows stored XSS via the LOGO_PATH key value in the logon settings.
How severe is CVE-2021-40178?: CVE-2021-40178 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-2021-40178 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40178?: CVE-2021-40178 primarily affects Zohocorp Manageengine Log360. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40178?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40178 published?: CVE-2021-40178 was published on 2021-08-29 and last updated on 2026-06-17.

References

https://www.manageengine.com/log-management/readme.html#Build%205224

Affected products (12)

cpe:2.3:a:zohocorp:manageengine_log360:*:*:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5200:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5201:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5206:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5209:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5210:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5211:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5213:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5214:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5218:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5219:*:*:*:*:*:*
cpe:2.3:a:zohocorp:manageengine_log360:5.2:build5220_beta:*:*:*:*:*:*

More vulnerabilities in Zohocorp Manageengine Log360

CVE-2021-20136 — Critical (CVSS 9.8): ManageEngine Log360 Builds < 5235 are affected by an improper access control vulnerability allowing database…
CVE-2021-40177 — Critical (CVSS 9.8): Zoho ManageEngine Log360 before Build 5225 allows remote code execution via BCP file overwrite.
CVE-2021-40175 — Critical (CVSS 9.8): Zoho ManageEngine Log360 before Build 5219 allows unrestricted file upload with resultant remote code execution.
CVE-2020-24786 — Critical (CVSS 9.8): An issue was discovered in Zoho ManageEngine Exchange Reporter Plus before build number 5510, AD360 before build number…
CVE-2021-40174 — High (CVSS 8.8): Zoho ManageEngine Log360 before Build 5224 allows a CSRF attack for disabling the logon security settings.
CVE-2021-40172 — High (CVSS 8.8): Zoho ManageEngine Log360 before Build 5219 allows a CSRF attack on proxy settings.

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