HTML in build information even without HTML formatter

[CendioOssman]

Jenkins and plugins versions report

Environment

Jenkins: 2.479.2
OS: Linux - 4.18.0-553.33.1.el8_10.x86_64
Java: 21.0.5 - Red Hat, Inc. (OpenJDK 64-Bit Server VM)
---
analysis-model-api:12.9.1
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
apache-httpcomponents-client-5-api:5.4-124.v31e2987e48f4
asm-api:9.7.1-97.v4cc844130d97
audit-trail:382.vf64d6f626060
authentication-tokens:1.119.v50285141b_7e1
bootstrap5-api:5.3.3-1
bouncycastle-api:2.30.1.78.1-248.ve27176eb_46cb_
branch-api:2.1200.v4b_a_3da_2eb_db_4
build-monitor-plugin:1.14-947.vfec2cf655fe2
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.2.1
cloudbees-folder:6.959.v4ed5cc9e2dd4
command-launcher:116.vd85919c54a_d6
commons-lang3-api:3.17.0-84.vb_b_938040b_078
commons-text-api:1.12.0-129.v99a_50df237f7
configuration-as-code:1897.v79281e066ea_7
copyartifact:757.v05365583a_455
credentials:1389.vd7a_b_f5fa_50a_2
credentials-binding:687.v619cb_15e923f
dark-theme:479.v661b_1b_911c01
data-tables-api:2.1.8-1
display-url-api:2.209.v582ed814ff2f
dtkit-api:3.0.2
durable-task:581.v299a_5609d767
echarts-api:5.5.1-4
eddsa-api:0.3.0-4.v84c6f0f4969e
font-awesome-api:6.6.0-2
forensics-api:2.6.0
git:5.6.0
git-client:6.1.0
git-server:126.v0d945d8d2b_39
gitlab-plugin:1.9.6
gravatar:113.v8846c95107e6
gson-api:2.11.0-85.v1f4e87273c33
instance-identity:201.vd2a_b_5a_468a_a_6
ionicons-api:74.v93d5eb_813d5f
jackson2-api:2.17.0-379.v02de8ec9f64c
jakarta-activation-api:2.1.3-1
jakarta-mail-api:2.1.3-1
javadoc:280.v050b_5c849f69
javax-activation-api:1.2.0-7
javax-mail-api:1.6.2-10
jaxb:2.3.9-1
jdk-tool:80.v8a_dee33ed6f0
jersey2-api:2.44-151.v6df377fff741
jnr-posix-api:3.1.19-2
joda-time-api:2.13.0-93.v9934da_29b_a_e9
jquery3-api:3.7.1-2
jsch:0.2.16-86.v42e010d9484b_
json-api:20240303-101.v7a_8666713110
json-path-api:2.9.0-118.v7f23ed82a_8b_8
junit:1309.v0078b_fecd6ed
kerberos-sso:1.11
ldap:770.vb_455e934581a_
log-parser:2.3.6
mailer:489.vd4b_25144138f
mapdb-api:1.0.9-40.v58107308b_7a_7
markdown-formatter:235.v2b_16f8e14918
matrix-auth:3.2.3
matrix-project:840.v812f627cb_578
maven-plugin:3.24
mina-sshd-api-common:2.14.0-133.vcc091215a_358
mina-sshd-api-core:2.14.0-133.vcc091215a_358
pam-auth:1.11
pipeline-build-step:540.vb_e8849e1a_b_d8
pipeline-graph-analysis:216.vfd8b_ece330ca_
pipeline-groovy-lib:744.v5b_556ee7c253
pipeline-input-step:495.ve9c153f6067b_
pipeline-milestone-step:119.vdfdc43fc3b_9a_
pipeline-model-api:2.2218.v56d0cda_37c72
pipeline-model-definition:2.2218.v56d0cda_37c72
pipeline-model-extensions:2.2218.v56d0cda_37c72
pipeline-rest-api:2.34
pipeline-stage-step:312.v8cd10304c27a_
pipeline-stage-tags-metadata:2.2218.v56d0cda_37c72
pipeline-stage-view:2.34
plain-credentials:183.va_de8f1dd5a_2b_
plugin-util-api:5.1.0
prism-api:1.29.0-18
scm-api:698.v8e3b_c788f0a_6
script-security:1369.v9b_98a_4e95b_2d
slack:751.v2e44153c8fe1
snakeyaml-api:2.3-123.v13484c65210a_
ssh-agent:376.v8933585c69d3
ssh-credentials:349.vb_8b_6b_9709f5b_
ssh-slaves:2.973.v0fa_8c0dea_f9f
sshd:3.330.vc866a_8389b_58
structs:338.v848422169819
subversion:1281.vc8837f91a_07a_
template-project:1.5.2
theme-manager:262.vc57ee4a_eda_5d
token-macro:400.v35420b_922dcb_
trilead-api:2.147.vb_73cc728a_32e
variant:60.v7290fc0eb_b_cd
warnings-ng:11.12.0
workflow-aggregator:600.vb_57cdd26fdd7
workflow-api:1336.vee415d95c521
workflow-basic-steps:1058.vcb_fc1e3a_21a_9
workflow-cps:3996.va_f5c1799f978
workflow-durable-task-step:1398.vf6c9e89e5988
workflow-job:1468.vcf4f5ee92395
workflow-multibranch:795.ve0cb_1f45ca_9a_
workflow-scm-step:427.v4ca_6512e7df1
workflow-step-api:678.v3ee58b_469476
workflow-support:936.v9fa_77211ca_e1
xunit:3.1.5

What Operating System are you using (both controller, and any agents involved in the problem)?

RHEL 9

Reproduction steps

1. Configure GitLab and Jenkins integration
2. Install and enable Markdown formatter in Jenkins
3. Trigger a build

Expected Results

The build information text is either plain text, or Markdown. E.g.:

Triggered by GitLab Merge Request #35: example-repo => master

Actual Results

Build information is:

Triggered by <a href="https://git.example.com/repo/merge_requests/35" target="_blank">GitLab Merge Request #35</a>: example-repo => master

Which is not terribly readable.

Anything else?

No response

Are you interested in contributing a fix?

No response