MEDIUM
CVE-2020-15839
CWE-434Published: September 22, 2020· Updated: Jun 17, 2026
6.5
CVSS v3.1
Official Description
Liferay Portal before 7.3.3, and Liferay DXP 7.1 before fix pack 18 and 7.2 before fix pack 6, does not restrict the size of a multipart/form-data POST action, which allows remote authenticated users to conduct denial-of-service attacks by uploading large files.
Technical Analysis
CVE-2020-15839 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
liferay2 product(s)
digital experience platformliferay portal
Source: NVD CPE · 3 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (8)
→
https://issues.liferay.com/browse/LPE-17029Vendor Advisory
→
https://issues.liferay.com/browse/LPE-17055Vendor Advisory
→
→
→
https://issues.liferay.com/browse/LPE-17029Vendor Advisory
→
https://issues.liferay.com/browse/LPE-17055Vendor Advisory
→
Quick Facts
CVE IDCVE-2020-15839
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedSep 22, 2020
Related CVEs (CWE-434)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-15839 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.