CVE-2021-3539 json
EspoCRM Avatar Persistent XSS
published 2021-08-04 5 y ago modified 2026-06-17 4 mo ago also BIT-espocrm-2021-3539 , EUVD-2021-26850
- cvss
- 6.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
EspoCRM 6.1.6 and prior suffers from a persistent (type II) cross-site scripting (XSS) vulnerability in processing user-supplied avatar images. This issue was fixed in version 6.1.7 of the product.
Patch / fix
- bitnami espocrm 6.1.6
Exploit prediction
0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | espocrm | <6.1.6 |
6.1.6 |
Affected products
- EspoCRM EspoCRM
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
rapid7.com
/blog/post/2021/07/27/multiple-open-source-web-app-vulnerabilities-fixed/
third-party-advisory, web
Sources
- CVE List CVE-2021-3539
- NVD CVE-2021-3539
- OSV BIT-espocrm-2021-3539
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