VulnerabilityPublished 19 Aug 2025Updated 9 Sep 2025

CVE-2025-50434: Appian Enterprise Business Process Management · Improper Access Control

Source CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Given the absence of official patches or vendor guidance, European organizations should implement compensating controls to mitigate risk. These include: 1) Conducting a thorough access control review and audit within the Appian BPM environment to ensure strict role-based access controls and least privilege principles are enforced. 2) Monitoring and logging all access to sensitive BPM processes and data, with alerts for anomalous or unauthorized access attempts. 3) Restricting network access to the BPM system to trusted internal networks or VPNs, minimizing exposure to the public internet. 4) Applying network-level protections such as web application firewalls (WAFs) to detect and block suspicious requests targeting BPM endpoints. 5) Engaging with Appian support or vendor channels to seek clarification and updates regarding this CVE and any forthcoming patches or advisories. 6) Preparing incident response plans specific to BPM data exposure scenarios. 7) Ensuring that sensitive data within BPM workflows is encrypted at rest and in transit to reduce impact in case of unauthorized access. These targeted measures go beyond generic advice by focusing on access control hardening, network segmentation, and proactive monitoring tailored to the BPM environment.

Description

A security issue has been identified in Appian Enterprise Business Process Management version 25.3. The vulnerability is related to incorrect access control, which under certain conditions could allow unauthorized access to information. NOTE: this has been disputed because the CVE Record information does not originate from the Supplier, and the report lacks specificity about why a problem exists, how the behavior could be reproduced, and whether any action could be taken to resolve the problem.

Impact

For European organizations using Appian Enterprise BPM 25.3, this vulnerability could lead to unauthorized disclosure of sensitive business process information, potentially exposing confidential workflows, operational data, or personally identifiable information processed within the BPM system. This could undermine business confidentiality, lead to competitive disadvantage, or violate data protection regulations such as GDPR if personal data is involved. Since the vulnerability does not affect integrity or availability, the risk of data tampering or service disruption is low. However, the ease of remote exploitation without authentication increases the risk profile. The lack of confirmed exploit activity reduces immediate threat but does not eliminate potential risk, especially for organizations with critical business processes automated via Appian BPM. European enterprises in sectors like finance, manufacturing, healthcare, and public administration that rely on BPM solutions for process automation and data handling could be particularly sensitive to such unauthorized access. Additionally, regulatory compliance requirements in Europe heighten the impact of any unauthorized data exposure.

Summary

CVE-2025-50434 is a reported vulnerability affecting Appian Enterprise Business Process Management (BPM) version 25.3. The issue is categorized as an incorrect access control vulnerability (CWE-284), which could potentially allow unauthorized users to gain access to information under certain conditions. The vulnerability has a CVSS v3.1 base score of 5.3, indicating a medium severity level. The vector string (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) suggests that the vulnerability can be exploited remotely over the network without any privileges or user interaction, and it impacts confidentiality only, without affecting integrity or availability. However, the CVE record itself is disputed due to a lack of originating confirmation from the vendor (Appian), insufficient detail on the nature of the vulnerability, absence of reproducibility steps, and no clear remediation guidance or patches available. No known exploits have been reported in the wild to date. The vulnerability relates to improper enforcement of access controls, which could allow unauthorized information disclosure if exploited. Given the nature of BPM systems, which often handle sensitive business workflows and data, unauthorized access could expose confidential business process information or sensitive organizational data.

CWE-284Improper Access Control (opens in a new tab)
Pillar weaknessCWE Top 25 (2025): #19OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Operation
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design · Separation of Privilege
Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
OWASP Cheat Sheets
Docker Security (opens in a new tab)
Third Party Javascript Management (opens in a new tab)
Virtual Patching (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V1.4.4 (opens in a new tab)
V1.4.5 (opens in a new tab)
V1.10.1 (opens in a new tab)
Attack patterns
Embedding Scripts within Scripts (opens in a new tab)
Modification of Windows Service Configuration (opens in a new tab)
Malicious Root Certificate (opens in a new tab)
Intent Spoof (opens in a new tab)
WebView Exposure (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

gist.github.com/Exploit097/11f87812186012efa3ffd9d1fec152ed (opens in a new tab)

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 9 Sep 2025, 21:23 UTC

WeaknessesCWE-284

Technical details

References

Community reviews

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