SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityAnalyzed

CVE-2024-4358

Progress Telerik Report Server Authentication Bypass by Spoofing Vulnerability

KEVEXPLOITCRITICAL 9.8EPSS 97.5%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 July 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

In Progress Telerik Report Server, version 2024 Q1 (10.0.24.305) or earlier, on IIS, an unauthenticated attacker can gain access to Telerik Report Server restricted functionality via an authentication bypass vulnerability.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
97.48% probability · 100th percentile
Public exploits
1 in Exploit-DB · first 28 March 2025
CISA KEV
Listed 13 June 2024 · due 4 July 2024
Weakness
CWE-290
Affected
telerik/report server 2024
Source
security@progress.com
EPSS trend
0%50%100%30 October 2026: 97.48%30 October 202630 October 2026

EPSS 97.5% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://docs.telerik.com/report-server/knowledge-base/registration-auth-bypass-cve-2024-4358; https://nvd.nist.gov/vuln/detail/CVE-2024-4358

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-52103source ↗Progress Telerik Report Server 2024 Q1 (10.0.24.305) - Authentication Bypassmultiple · VeryLazyTechwebapps28 March 2025no

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.