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CVE-2023-1714· NVD / CVE Program· CNA STAR_Labs

Bitrix24 Remote Command Execution (RCE) via Unsafe Variable Extraction

Unsafe variable extraction in bitrix/modules/main/classes/general/user_options.php in Bitrix24 22.0.300 allows remote authenticated attackers to execute arbitrary code via (1) appending arbitrary content to existing PHP files or (2) PHAR deserialization.

HighCVSS 8.8 · v3.1—No exploit No fix recorded
Published
Nov 1, 2023
Updated
Jun 17, 2026
EPSS
1.4% · 72th percentile
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Report tools

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Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.8
CNA · STAR_Labs
8.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

VendorProduct
bitrix24bitrix24

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • bitrix24 bitrix2422.0.300

Versions reported by the vendor

Affected version ranges reported by the assigning authority (STAR_Labs). Independent of NVD's CPE analysis and usually ahead of it.

  • Bitrix24 Bitrix24

    • up to and including 22.0.300affected

Same product

bitrix24: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-27228In the vote (aka "Polls, Votes") module before 21.0.100 of Bitrix Site Manager, a remote unauthenticated attacker can execute arbitrary code
    45Plan
  • CVE-2023-1719Bitrix24 Insecure Global Variable Extraction
    40Plan
  • CVE-2020-13484Bitrix24 through 20.0.975 allows SSRF via an intranet IP address in the services/main/ajax.php?action=attachUrlPreview url parameter, if the
    40Plan
  • CVE-2023-1717Bitrix24 Cross-Site Scripting (XSS) via Client-side Prototype Pollution
    38Monitor
  • CVE-2023-1716Bitrix24 Stored Cross-Site Scripting (XSS) via Improper Input Neutralization on Invoice Edit Page (2 of 2)
    38Monitor
  • CVE-2023-1718Bitrix24 Denial-of-Service (DoS) via Improper File Stream Access
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-502 · Deserialization of Untrusted Data

CVSS vector

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

nvd-primary

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

The bug in code

The whole CWE-502 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

python
payload = sock.recv(65536)job = pickle.loads(payload)

Fixed

python
payload = sock.recv(65536)if not hmac.compare_digest(sign(payload), header_sig):    raise PermissionError("invalid signature")job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

All records