CVE-2025-32376 | Discourse DM limits aren’t always properly enforced

Discourse is an open-source discussion platform. Prior to versions 3.4.3 on the stable branch and 3.5.0.beta3 on the beta branch, the users limit for a DM can be bypassed, thus giving the ability to potentially create a DM with every user from a site in it. This issue has been patched in stable version 3.4.3 and beta version 3.5.0.beta3.

Published: 2025-04-30 Last update: 2025-05-16 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-32376 is rated Low Risk (25.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-32376

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-08 0.21% 0.06% -0.15%
2 2026-02-24 0.07% 0.21% +0.14%
3 2026-01-14 — 0.07% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-32376

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 4.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:A)
User interaction is required in an active way.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:L)
Limited availability impact on subsequent systems.
Exploit maturity (threat) (E:X)
Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:X)
Not evaluated.
Recovery (supplemental) (R:X)
Not evaluated.
Value density (supplemental) (V:X)
Not evaluated.
Vulnerability response effort (supplemental) (RE:X)
Not evaluated.
Provider urgency (supplemental) (U:X)
Not evaluated.
 — — [email protected]
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
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.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2025-32376

Affected software / configurations for CVE-2025-32376

Vendor Product Version Raw CPE
discourse discourse < 3.4.3 cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta1:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta2:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta3:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta4:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta5:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta6:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta6b:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta7:*:*:beta:*:*:*
discourse discourse 1.1.0 cpe:2.3:a:discourse:discourse:1.1.0:beta8:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta1:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta2:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta3:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta4:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta5:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta6:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta7:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta8:*:*:beta:*:*:*
discourse discourse 1.2.0 cpe:2.3:a:discourse:discourse:1.2.0:beta9:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta1:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta10:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta11:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta2:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta3:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta4:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta5:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta6:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta7:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta8:*:*:beta:*:*:*
discourse discourse 1.3.0 cpe:2.3:a:discourse:discourse:1.3.0:beta9:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta1:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta10:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta11:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta12:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta2:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta3:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta4:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta5:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta6:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta7:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta8:*:*:beta:*:*:*
discourse discourse 1.4.0 cpe:2.3:a:discourse:discourse:1.4.0:beta9:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta1:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta10:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta11:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta12:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta13:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta13b:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta14:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta2:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta3:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta4:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta5:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta6:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta7:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta8:*:*:beta:*:*:*
discourse discourse 1.5.0 cpe:2.3:a:discourse:discourse:1.5.0:beta9:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta1:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta10:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta11:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta12:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta2:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta3:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta4:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta5:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta6:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta7:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta8:*:*:beta:*:*:*
discourse discourse 1.6.0 cpe:2.3:a:discourse:discourse:1.6.0:beta9:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta1:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta10:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta11:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta2:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta3:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta4:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta5:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta6:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta7:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta8:*:*:beta:*:*:*
discourse discourse 1.7.0 cpe:2.3:a:discourse:discourse:1.7.0:beta9:*:*:beta:*:*:*

References for CVE-2025-32376

cvelogic Threat Intelligence