CVE-2023-21888 [Medium] | Security Vulnerability in Primavera Gateway

Vulnerability in the Primavera Gateway product of Oracle Construction and Engineering (component: WebUI). Supported versions that are affected are 18.8.0-18.8.15, 19.12.0-19.12.15, 20.12.0-20.12.10 and 21.12.0-21.12.8. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Primavera Gateway. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Primavera Gateway, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Primavera Gateway accessible data as well as unauthorized read access to a subset of Primavera Gateway accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.34%	0.38%	+0.04%
2	2026-06-07	0.36%	0.34%	-0.02%
3	2026-05-20	—	0.36%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.34%

0.38%

+0.04%

2026-06-07

0.36%

0.34%

-0.02%

2026-05-20

—

0.36%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.4	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.3	2.7	[email protected]
5.4	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.3	2.7	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.4

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.3

2.7

[email protected]

5.4

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.3

2.7

[email protected]

Affected software / configurations for CVE-2023-21888

Vendor	Product	Version	Raw CPE
oracle	primavera_gateway	>= 18.8.0, <= 18.8.15	cpe:2.3:a:oracle:primavera_gateway::::::::
oracle	primavera_gateway	>= 19.12.0, <= 19.12.15	cpe:2.3:a:oracle:primavera_gateway::::::::
oracle	primavera_gateway	>= 20.12.0, <= 20.12.10	cpe:2.3:a:oracle:primavera_gateway::::::::
oracle	primavera_gateway	>= 21.12.0, <= 21.12.8	cpe:2.3:a:oracle:primavera_gateway::::::::

References for CVE-2023-21888

URL	Tags
https://www.oracle.com/security-alerts/cpujan2023.html	Patch Vendor Advisory

URL

CVE-2023-21888

Exploit prediction scoring system (EPSS) score for CVE-2023-21888

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21888

Weakness enumeration for CVE-2023-21888

Affected software / configurations for CVE-2023-21888

References for CVE-2023-21888