CVE-2026-87939
Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
- Record
CVE-2026-87939- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2026-107862
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
- Record
EUVD-2026-107862- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cw7v-hw53-2792
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")...
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
- Record
GHSA-cw7v-hw53-2792- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
- Record
CVE-2026-87939- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Feed Block - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-137
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.
- Record
CVE-2026-87939- CVSS 3.1
- 4.2 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVDRUPAL-CONTRIB-2026-137No score
The Feed Block module provides a block content type that displays items pulled from a remote RSS/Atom feed.
The module does not sufficiently validate or sanitize the RSS feed it generates, resulting in a stored cross-site scripting (XSS) vulnerability.
- Record
DRUPAL-CONTRIB-2026-137- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
drupal/feed_blockPackagist:https://packages.drupal.org/8 | before 2.0.2, 3.0.0 up to 3.0.2 | 2.0.23.0.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-87939 is a medium vulnerability (CVSS 4.2) in Drupal Feed Block, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. Fixed in drupal/feed_block 2.0.2.