CVE-2025-34086: Boltcms Bolt remote code execution (CVSS 8.8)

Description

Bolt CMS versions 3.7.0 and earlier contain a chain of vulnerabilities that together allow an authenticated user to achieve remote code execution. A user with valid credentials can inject arbitrary PHP code into the displayname field of the user profile, which is rendered unsanitized in backend templates. The attacker can then list and rename cached session files via the /async/browse/cache/.sessions and /async/folder/rename endpoints. By renaming a .session file to a path under the publicly accessible /files/ directory with a .php extension, the attacker can turn the injected code into an executable web shell. Finally, the attacker triggers the payload via a crafted HTTP GET request to the rogue file. NOTE: The vendor announced that Bolt 3 reached end-of-life after 31 December 2021.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Boltcms Bolt≤ 3.7.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://boltcms.io/newsitem/major-announcements-bolt-3-eol-bolt-4-2-5-0-releasesRelease Notes
https://github.com/bolt/boltProduct
https://github.com/bolt/bolt/releases/tag/3.7.1Release Notes
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/webapp/bolt_authenticated_rce.rbExploit
https://www.exploit-db.com/exploits/48296ExploitVDB Entry
https://www.rapid7.com/db/modules/exploit/unix/webapp/bolt_authenticated_rce/ExploitThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-34086 being actively exploited?

CVE-2025-34086 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 4.22%.

How severe is CVE-2025-34086?

CVE-2025-34086 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 4.22% probability of exploitation.

Which products are affected by CVE-2025-34086?

Affected products include Boltcms Bolt.

How do I fix CVE-2025-34086?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-34086 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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