CVE-2019-16108Network attack vector

Page-style manipulation via unvalidated BBCode parameters

Published Mar 19, 2020 · Updated Aug 5, 2024

CSS injection in phpBB 3.2.7 allows remote attackers to alter rendered forum pages through crafted BBCode parameters. Improper validation of BBCode parameters lets supplied values modify the rendered style attribute and inject arbitrary CSS token sequences. Reachability requires permission to submit BBCode-enabled content; the reported consequence is arbitrary page styling, not script or server-side code execution.

CVSS severity7.5
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSS injection in phpBB 3.2.7 allows remote attackers to alter rendered forum pages through crafted BBCode parameters. Improper validation of BBCode parameters lets supplied values modify the rendered style attribute and inject arbitrary CSS token sequences. Reachability requires permission to submit BBCode-enabled content; the reported consequence is arbitrary page styling, not script or server-side code execution.

The record

CVE
CVE-2019-16108
Published
Mar 19, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, CAPEC-35, CAPEC-242, CAPEC-77, T1491.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CAPEC-35Leverage Executable Code in Non-Executable Files
CAPEC-242Code Injection
CAPEC-77Manipulating User-Controlled Variables
T1491.002External Defacement

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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