What is CVE-2020-8778?

CVE-2020-8778 is a medium-severity vulnerability in Alfresco, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-03-02.

How severe is CVE-2020-8778?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-8778 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Alfresco

CVE-2020-8778

Alfresco Enterprise before 5.2.7 and Alfresco Community before 6.2.0 (rb65251d6-b368) has XSS via an uploaded document, when the attacker has write access to a project.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.026 (84.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Alfresco

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

gitlab.com/snippets/1937042 (Exploit, Third Party Advisory)
issues.alfresco.com/jira/browse/ALF-22110 (Permissions Required, Vendor Advisory)
packetstormsecurity.com/files/156599/Alfresco-5.2.4-Cross-Site-Scripting.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8778?: CVE-2020-8778 is a medium-severity vulnerability in Alfresco, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-03-02.
How severe is CVE-2020-8778?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-8778 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.